Thursday, November 24, 2016

Published November 24, 2016 by Knowminfo with 0 comment

Psychology Facts

1. Kids are more high strung today than the average psych ward patient in 1950. Which is pretty scary but not surprising. About half the human population now suffers anxiety, depression, or a sort of substance abuse.
2. If you announce your goals, you're less likely to succeed.
3. Spending money on experience instead of stuff also makes you happier.
4. Being alone Hlps you see the loneliness of others.
5. Scientists say the brain purposely forgets certain memories in order to avoid information overload, and emotional hangovers.
6. The brain naturally craves four things: food, sex, water and sleep.
7. Happiness causes increased helping behavior.
8. Activities like card games, crossword puzzles, working on the computer, doing volunteer work and reading can maintain cognitive function in the elderly.
9. Procrastinators actively look for distractions, particularly ones that don't take a lot of commitment on their part.
10. The more loyal you are, the more disappointment you encounter and experience.
11. Holding in the tears and pretending to be okay puts a lot of stress on your mind and your heart. crying keeps you healthy.
12. Sleep makes you more creative and makes your memories stronger.
13. Psychology says, no matter how angry you get, you always end up forgiving the people you love.
14. If you want to change something about yourself, repeat your intentions over and over. Eventually your brain wil get into a new pattern.
15. Psychologists say that when meeting somene for the first time, you only have about 7 seconds to make a powerful first impression.
16. A psychological study found that people who are generally 'too nice' are also the ones to get hurt the most.
17. The human mind can only maintain complete trust once for each person. Once broken, it's never the same.
18. Mentally talking to yourself during tasks is actually a good way to keep yourself focused.
19. Twenty years from now, you will be more disappointed by the things you didn't do than by the things you did do.
20. Men change their minds up to 3 times as often as women do. also, men are more likely to make impulsive decisions than women are.
21. A smal amount of stress helps you to remember things better but a large amount hinders your memory.
22. People who laugh more are better to tolerate pain both physical and emotional pain.
23. Your brain is programmed to make 3 things impossible to ignore: food, sex and danger.
24. People are more likely to over think and overanalyze things when they're just about to fall asleep due to the decreased distractions.
25. Playing video games has been proven to relive tension, depression and psychological pain caused by emotional trauma.
26. Women are automatically more attracted to guys who make an effort to start the conversation, showing initiative and consistency.
27. Overthinking puts you to a higher risk for a psychotic (mental) breakdown.
28. Usually thinking of successful outcome will reduce our motivation rather than increase it.
29. Psychology says that women who play more online video games then to be happier in their relationships than those who don't.
30. When you have a crush on someone, you brain overlooks and ignores the flaws of that person causing them to appear perfect.
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Tuesday, November 22, 2016

Published November 22, 2016 by Knowminfo with 0 comment

Facts about Human body

1. The human eye is so sensitive that if the Earth were flat, you could spot a candle flickering at night from up to 30 miles away. 
2. Nerve impulses travel to and from the brain at speeds of up to 250 miles per hour, faster than a Formula 1 racecar. 
3. When you blush, the lining of your stomach blushes too. 
4. The human brain can read up to 1,000 words per minute. 
5. Inside your belly button are thousands of bacteria that form an ecosystem the size of an entire rainforest. 
6. When in love, the human brain releases the same cocktail of neurotransmitters and hormones that are released by amphetamines. This leads to increased heart rate, loss of appetite and sleep, and intense feelings of excitement. 
7. You can see ultraviolet light, the ability is just filtered out by the eye's lens. Some people have undergone surgery to remove the lense and can detect ultraviolet light. 
8. An adult is made up of 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms. For perspective, there's a 'measly' 300,000,000,000 (300 billion) stars in our galaxy. 
9. Our muscles are actually incredibly more powerful than they appear to be. Human strength is limited to protect our tendons and muscles from harming themselves. This limitation can be removed during an adrenaline rush, during which some people have lifted boulders or even cars off themselves. 
10. We humans are the best long-distance runners on the planet. Better than any four-legged animal. In fact, thousands of years ago we used to run after our prey until they died of exhaustion. 
11. A full head of human hair is strong enough to support 12 tonnes. 
12. In 30 minutes, the human body gives off enough heat to bring a gallon of water to the boil 
13. We have the same amount of hairs on our body as a chimpanzee. Most are useless and so fine that they are invisible. 
14. The atoms that make up your human body today are same atoms that formed during the Big Bang 13.7 billion years ago. 
15. Human bone is as strong as granite. A block of bone the size of a matchbox could support nine tonnes of weight. 
16. If the human brain were a computer, it could perform 38 thousand-trillion operations per second. The world's most powerful supercomputer, BlueGene, can manage only .002% of that. 
17. The focusing muscles in your eyes move around 100,000 times a day. To give your leg muscles the same workout, you'd need to walk 50 miles. 
18. For every pound of fat or muscle gained, your body creates seven miles of new blood vessels 
19. Humans share 50% of their DNA with bananas. 
20. Loneliness is physically painful. Just as you have a drive to avoid physical pain, you have a similarly powerful drive to connect with others and seek companionship - in order to avoid the pain of loneliness. 
21. A single human sperm contains the 37.5mb of male DNA required to create a human child. That means an average ejaculation sees the transfer of 1,500 terabytes of information. 
22. Your body produces 25 million new cells each second. Every 13 seconds, you produce more cells than there are people in the United States. 
23. Humans are bioluminescent and glow in the dark. The light that we emit is 1,000 times weaker than our human eyes are able to pick up. 
24. Humans shed 40 pounds of skin in their lifetime, completely replacing their outer skin every month. 
25. In one day, your blood travels 12,000 miles around your body. That's four times the distance across the US from coast-to-coast. 
26. Our brain's connected neurons look similar to the structure of the universe. In a way, our brains are modeled after the universe. 
27. Around 90% of the cells that make humans aren't “human" in origin. We're mostly fungi and bacteria. 
28. Along with the five traditional senses of sound, sight, touch, smell and taste, humans have 15 “other senses." These include balance, temperature, pain and time as well as internal senses for suffocation, thirst, and fullness. 
29. You're a little richer than you might think. Inside all of us is around 0.2 milligrams of gold, most of which is in our blood Sadly, you'd need the blood of around 40,000 people to collect enough gold to make one 8g coin. 
30. The human brain uses 20% of the entire body's oxygen and calorie intake, despite only accounting for about 2% of an adult's body mass. 
31. If you stretched out the 300,000,000 capillaries in your lungs end to end, the line would extend from Seattle to San Diego, or about 1,300 miles. 
32. Some women see more colors than everyone else. Most people have three types of color receptors to see color vision, while some women have four or even five of these receptors and can see a wider range of colors. 
33. A condition called synesthesia can cause senses to overlap. In other words, some people can taste words or hear colors. 
34. The need to breathe so much is due to carbon dioxide buildup more than the need for oxygen. If there was a different way to get rid of carbon dioxide from the blood, we would only need to breathe at a rate of about once per minute. 
35. Crying alleviates stress and allows humans to decrease feelings of anger and sadness. It physically does help to let it out. 
36. The brain uses over a quarter of the oxygen used by the human body. More human brain facts. 
37. Your heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30. More human heart facts. 
38. Red blood cells carry oxygen around the body. They are created inside the bone marrow of your bones. More blood facts. 
39. The colour of a humans skin is determined by the level of pigment melanin that the body produces. Those with small amounts of melanin have light skin while those with large amounts have dark skin. More skin facts. 
40. Adult lungs have a surface area of around 70 square metres! More lung facts. 
41. Humans have a stage of sleep that features rapid eye movement (REM). REM sleep makes up around 25% of total sleep time and is often when you have your most vivid dreams. More eye facts. 
42. Most adults have 32 teeth. More teeth facts. 
43. The smallest bone found in the human body is located in the middle ear. The staples (or stirrup) bone is only 2.8 millimetres long. More ear facts. 
44. Your nose and ears continue growing throughout your entire life. More nose facts. 
45. Infants blink only once or twice a minute while adults average around 10. 
46. As well as having unique fingerprints, humans also have unique tongue prints. 
47. The left side of your body is controlled by the right side of your brain while the right side of your body is controlled by the left side of your brain. 
48. Antibiotics are only effective against bacteria, they won't help in fighting off a virus.
49. It takes the body around 12 hours to completely digest eaten food. 
50. Your sense of smell is around 10000 times more sensitive than your sense of taste. More senses facts. 
51. With the 60,000 miles of blood vessels inside the average human body, you could circumnavigate Earth two and a half times.
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Published November 22, 2016 by Knowminfo with 0 comment

Biology Facts

1. Research suggests that Children tend to grow faster in spring season as compared to any other time of the year ! 
2. Do you know that on average,men have larger noses than women ! 
3. Do you know that the enamel on the top surface of our tooth is the hardest part of the entire body ! 
4. Food is either cooled or warmed to a suitable temperature in the mouth ! 
5. Hugging releases oxytocin,which helps to heal physical wounds,makes someone trust you more ! 
6. Do you know that your Toe-prints are also unique , just like your finger prints !And imagine even your tongue print is unique! 
7. You know ,you have no sense of smell when you're sleeping! 
8. You know ,you can see your nose all the time but somehow your brain always ignores it! 
9. We all blink after every few seconds, but do we know the purpose of blinking ! Blinking helps to wash tears over our eyeballs.That keeps them clean and moist. 
10. An average person has over 1,460 dreams a year which is about 4 dreams every night! 
11. On a clear night ,the human eye can see between 2000 to 3000 stars in the sky. 
12. Do you know the similarity between human body and a banana? You will be amazed to know that 50% of human DNA is same as in banana! 
13. The human body has enough iron in it to make 3 inches long nail. 
14. A human heart pumps enough blood to fill 100 swimming pools in an average lifetime.In the same time it will beat almost three billion times 
15. While sleeping, one person out of every eight snores, and one in ten grinds his teeth 
16. All babies are color blind when they are born ,so > they only see black & white. 
17. People with dark color skin wrinkle later than the people having light color skins! 
18. Guess how many muscles are working when you take a step! Well, about 200 muscles are used when we take a single step!
19. Weight of the eyeball ! The eyeball of a human weighs approximately 28 grams. 
20. People generally read 25% slower from a computer screen compared to paper. 
21. Do you know ,it is impossible to sneeze with your eyes open ! 
22. And do you know ,it is impossible to hum while your nose is plugged close ! 
23. Do you know 'rhinoplasty' is the name given to plastic surgery which involves nose ! 
24. Have you heard about Anosmia ,Dysosmia ,Hyperosmia? These all words are related to sense of smelling. Anosmia means inability to smell and Dysosmia is a condition where things don't smell like they should smell whereas Hyperosmia means strong sense of smelling ! 
25. Here is one more trivia about nose :the technical term for sense of smell is 'olfaction' ! 
26. Your brain is move active and thinks more at night than during the day. 
27. Here is an amazing fact about the brain,it uses 20% of the total oxygen and blood in your body. 
28. Do you know what is Uvula? It is the small piece of the small tissue dangling over the tongue. 
29. Now this is cool ,the tongue is the strongest muscle in the human body. 
30. And did you know that our fingers don't have any muscles ? The muscles which move our finger joints are located in the palm and up in the forearm. 
31. An adult human body contains approximately 100 trillion cells! 
32. Your tongue has 3,000 taste buds. 
33. Do you know ,your brain is 80% water? 
34. No pain in the brain! Do you know our brain does not feel pain! Even though brain processes pain signals,the brain itself actually does not feel pain. 
35. Bones in an adult account for 14% of the body's total weight. 
36. The tips of your fingers have enough strength to support the weight of your whole body 
37. When you are born with 300 bones in their body, but as an adult you only have 206 bones. This happens because many of them join together to make a single bone. 
38. The outsides of a bone are hard, they are light and soft inside. They are about 75% water. 
39. The strongest bone in your body is the femur (thighbone), and it's hollow! 
40. The smallest bone in the human body is the staples bone which is located in the ear,it is also called stirrup . 
41. Men get hiccups more often than women.
42. A sneeze can exceed the speed of 100 miles per hour.When a sneeze leaves your body ,it is at such a high speed that you should avoid suppressing it. 
43. It takes food only seven seconds to go from the mouth to the stomach via the esophagus, pretty fast , right? 
44. Enamel is hardest substance in the human body. 
45. Fingernails grow nearly 4 times faster than toenails! 
46. Women hearts beat faster than men. Also women blink more than men ! 
47. In one day ,your heart beats 100,000 times. 
48. People with darker skin will not wrinkle as fast as people with lighter skin. 
49. The reason honey is so easy to digest is that it’s already been digested by a bee. 
50. The only part of the body that has no blood supply is the cornea in the eye. It takes in oxygen directly from the air. 
51. The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting. 
52. Women blink nearly twice as much as men. 
53. It takes about 20 seconds for a red blood cell to circle the whole body. 
54. Every drop of blood in your body is filtered by your body over 300 times a day. 
55. Babies are born with pink lungs but they darken in color as we breathe in polluted air. 
56. Your right lung is bigger than left lung! The left lung is small so as to adjust heart in that part ! 
57. Human hair and fingernails continue to grow after death. 
58. You burn more calorie while sleeping than watching TV.
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Monday, November 21, 2016

Published November 21, 2016 by Knowminfo with 0 comment

Chemistry Facts

1. There is about 1/2lb or 250g of table salt (NaCl) in the body of an average adult human.
2. Lightning strikes produce ozone (O3) and help strengthen the ozone layer. 
3. Humans have been using chemistry since at least Ancient Egypt. By 1000bce human civilizations were using advanced forms of chemistry like extracting metals from ore, fermenting alcohol, and refining plant extracts as medicine. 
4. DNA is flame retardant. 
5. One bucketful of water contains more atoms than the Atlantic Ocean does bucketfuls of water. 
6. If you slowly pour a handful of salt into a completely full glass of water, it will not overflow. In fact, the water level will go down. 
7. Although oxygen gas is colorless (light refraction aside), both the liquid and solid forms are blue. 
8. One inch of rain is equal to 10 inches of snow. 
9. You have chemoreceptors (taste buds) on the inside of your cheeks too. 
10. Hydrofluoric acid is so corrosive that it will dissolve glass. Although it is corrosive, hydrofluoric acid is considered to be a ‘weak acid’. 
11. Approximately 20% of the oxygen in the atmosphere was produced by the Amazonian rainforests. 
12. The only elements that are liquid at room temperature are bromine and mercury. 
13. Though solid at room temperature, gallium will liquefy in your hand. 
14. Hydrogen is the most abundant element. About 75% of the elemental mass of the universe is hydrogen. 
15. The most common isotope of hydrogen is protium, with is 1 proton and 0 neutrons. 
16. The hardest chemical in your body is your tooth enamel. 
17. The ethylene gas produced by ripening fruit, ripens other fruit and vegetables. 
18. The only letter that doesn’t appear on the Periodic Table of Elements is J. 
19. The human body contains enough carbon to produce graphite for about 9,000 pencils. 
20. If you expose a glass of water to space, it will boil rather than freeze. The water vapor would almost immediately crystallize into ice.
21 Oxygen is the most abundant element in the Earth’s crust, water, and atmosphere. 
22. Bee stings are acidic while wasp stings are alkaline. 
23. Mosquitoes like the scent of estrogen, thus women get bitten more often than men do. 
24. The lighter was invented before the match. 
25. Hydrogen is the first element on the periodic table. It has an atomic number of 1. It is highly flammable and is the most common element found in our universe. 
26. Liquid nitrogen boils at 77 kelvin (−196 °C, −321 °F). 
27. Around 1% of the sun’s mass is oxygen. 
28. Helium is lighter than the air around us so it floats, that's why it is perfect for the balloons you get at parties. 
29. Carbon comes in a number of different forms (allotropes), these include diamond, graphite and impure forms such as coal. 
30. Under normal conditions, oil and water do not mix. More oil facts. 
31. Although it is still debated, it is largely recognized that the word 'chemistry' comes from an Egyptian word meaning 'earth'. 
32. The use of various forms of chemistry is believed to go back as long ago as the Ancient Egyptians. By 1000 BC civilizations were using more complex forms of chemistry such as using plants for medicine, extracting metal from ores, fermenting wine and making cosmetics. 
33. Things invisible to the human eye can often be seen under UV light, which comes in handy for both scientists and detectives. 
34. Humans breathe out carbon dioxide (CO2). Using energy from sunlight, plants convert carbon dioxide into food during a process called photosynthesis. 
35. Chemical reactions occur all the time, including through everyday activities such as cooking. Try adding an acid such as vinegar to a base such as baking soda and see what happens! 
36. Athletes at the Olympic Games have to be careful how much coffee they drink. The caffeine in coffee is a banned substance because it can enhance performance. One or two cups are fine but they can go over the limit with more than five. (update - as of 2004 caffeine has been taken back off the WADA banned list but its use will be closely monitored to prevent future abuse by athletes.) 
37. Calcium is a chemical element with the symbol Ca and an atomic number of 20. 
38. Calcium is not naturally found in its elemental state but calcium compounds are common. 
39. Carbon is a chemical element with the symbol C and atomic number 6. 
40. The word carbon comes from the Latin word carbo, meaning coal. 
41. Carbon forms a large number of compounds, more than any other element. Because of its willingness to bond to other nonmetallic elements it is often referred to as the building block of life. 
42. While carbon forms many different compounds it is a relatively unreactive element. 
43. There are several allotropes (different forms) of carbon with the three most well known being amorphous carbon (coal, soot etc), diamond and graphite. 
44. The properties of diamond and graphite are very different with diamond being transparent and very hard while graphite is black and soft (soft enough to write on paper). 
45. Graphite is used for its thermal insulation (lower rate of heat transfer) properties. It is also a very good conductor or electricity. 
46. The carbon atoms in graphite are bonded in flat hexagonal lattices and layered in sheets. 
47. Carbon is the 4th most common element in the Universe (after hydrogen, helium and oxygen). It is the 15th most common element in the Earth’s crust while it is the second most common element in the human body (behind oxygen). 
48. Carbon has the highest melting point of all elements, around 3500 °C (3773 K, 6332 °F). 
49. Hydrocarbons are organic compounds made entirely of molecules featuring just hydrogen and carbon. Organic chemistry involves the study of hydrocarbons. 
50. The simplest hydrocarbon compound is methane (CH4). 
51. The chemical element Chlorine has the symbol Cl and atomic number 17. 
52. On the periodic table Chlorine is in the halogen group and it is the 2nd lightest halogen gas after fluorine. 
53. In its standard form chlorine is a yellow-green gas, but its common compounds are usually colorless. Chlorine has a strong distinctive odor such as the smell of household bleach. 
54. The name Chlorine is from the Greek word chloros which means greenish yellow. 
55. Chlorine has a melting point of -150.7 °F (-101.5 °C) and a boiling point of -29.27 °F (-34.04 °C). 
56. The chemical symbol of hydrogen is H. It is an element with atomic number 1, this means that 1 proton is found in the nucleus of hydrogen. 
57. Hydrogen is the lightest, simplest and most commonly found chemical element in the Universe, making up around 75% of its elemental mass. 
58. Hydrogen is found in large amounts in giant gas planets and stars, it plays a key role in powering stars through fusion reactions. 
59. Hydrogen is one of two important elements found in water (H2O). Each molecule of water is made up of two hydrogen atoms bonded to one oxygen atom. 
60. Nitrogen is a chemical element with the symbol N and atomic number of 7. 
61. Under normal conditions nitrogen is a colorless, odorless and tasteless gas. 
62. Nitrogen makes up around 78% of the air you breathe. 
63. Nitrogen is present in all living things, including the human body and plants. 
64. Nitrogen gas is used in food storage to keep packaged or bulk foods fresh. It is also used in the making of electronic parts, for industrial purposes and has many other useful applications. 
65. Nitrogen gas is often used as an alternative to carbon dioxide for storing beer in pressurized kegs. The smaller bubbles it produces is preferred for some types of beer. 
66. Titan, the largest moon of Saturn, has an atmosphere nearly entirely made of nitrogen (over 98%). It is the only moon in our solar system known to have a dense atmosphere. 
67. Oxygen is an element with the chemical symbol O and atomic number 8. 
68. Oxygen is a very reactive element that easily forms compounds such as oxides. 
69. Under standard temperature and pressure conditions two oxygen atoms join to form dioxygen (O2), a colorless, tasteless and odorless gas. 
70. Oxygen is essential to human life, it is found in the air we breathe and the water we drink (H20). 
71. Oxygen makes up around 21% of the air you breathe. It is also the most common element in the Earth’s crust (around 47%) and the third most common element in the Universe (but far less than hydrogen and helium, the two most common). 
72. The large amount of oxygen on Earth is supported by the oxygen cycle which involves the movement of oxygen between the air, living things and the Earth’s crust. Photosynthesis (a process that converts carbon dioxide into organic compounds using sunlight) plays a major role in this cycle. 
73. Ozone (O3) is an allotrope (different form) of oxygen that combines three oxygen atoms together. While ground level ozone is an air pollutant, the ozone layer in the Earth’s upper atmosphere provides protection from the suns harmful rays by filtering UV light. 
74. The sun’s mass is made up of around 1% oxygen 
75. The chemical element Silicon has a symbol Si and atomic number 14. 
76. Silicon is a metalloid (or semi metal). This means it has some properties like a metal, for example, it looks like a metal and some like a non-metal, for example, it does not do conduct electricity very easily. 
77. Because silicon is a metalloid it is useful as a semiconductor which means it has electrical conductivity between metals and non-metal insulators like glass. 
78. Silicon is the 8th most abundant element in the universe by mass. 
79. Silicon is not found as a free element in nature, but rather it occurs as oxides and silicates in many minerals. Over 90% of the Earth's crust (about 28% by mass) is composed of silicate minerals, which is why silicon is the 2nd most common element on earth after oxygen. 
80. The melting point of sulfur is 247.3 °F (119.6 °C) and the boiling point is 832.3 °F (444.6 °C). 
81. Sulfur is non-toxic in its pure element form and in the sulphate form. But its compounds such as carbon disulphide, hydrogen sulphide and sulfur dioxide are all toxic. 
82. Mineral collectors like elemental sulfur crystals for their distinct, brightly colored polyhedron (multisided) shapes. 
83. Sulfur compounds can naturally occur as sulfide minerals such as pyrite, cinnabar, galena, sphalerite and stibnite. Or as sulfate minerals such as gypsum, alunite and barite.
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Published November 21, 2016 by Knowminfo with 0 comment

Physics Facts

1. Mass and inertia are the same thing. (Mass actually measures inertia - in kilogramsÂ… Much as monetary resources measures financial wealth - in dollars.) 
2. Weight (force of gravity) decreases as you move away from the earth by distance squared. (It decreases, but only approaches zero, never reaching it, even far beyond the solar system.) 
3. Weight (in newtons) is mass x acceleration (w = mg). Mass is not Weight! Mass is a scalar and measured in kilograms, weight is a force and a vector and measured in Newtons.
4. Velocity can only be constant when the net force (and acceleration) is zero. (The velocity can be zero and not constant - for example when a ball, thrown vertically, is at the top of its trajectory.) 
5. Velocity, displacement [s], momentum, force (weight), torque, and acceleration are vectors. 
6. Speed, distance [d], time, length, mass, temperature, charge, power and energy (joules) are scalar quantities. 
7. The slope of the distance-time graph is velocity. 
8. The slope of the velocity-time graph is acceleration. 
9. The area under a velocity-time graph is distance. 
10. Magnitude is a term used to state how large a vector quantity is. 
11. At zero (0) degrees two vectors have a resultant equal to their sum. At 180 degrees two vectors have a resultant equal to their difference. From the minimum value (at 180) to the maximum value (at zero) is the total range of all the possible resultants of any two vectors. 
12. An unbalanced force must produce an acceleration and the object cannot be in equilibrium. 
13. If an object is not accelerating, it is in equilibrium and no unbalanced forces are acting. 
14. The equilibrant force is equal in magnitude but opposite in direction to the resultant vector. 
15. Momentum is conserved in all collision systems. Energy is conserved (in the KE of the objects) only if a collision is perfectly elastic. 
16. Mechanical energy is the sum of the potential and kinetic energy. 
17. UNITS: a = [m/sec2]; F = [kg•m/sec2] = Newton; work = PE = KE = [kg•m2/sec2] = Joule; Power = [kg•m2/sec3] = [Joules/sec] = Watt 
18. 1ev is a very small energy unit equal to 1.6 x 10-19 joules - used for small objects such as electrons. This is on the Reference Chart. 
19. Gravitational potential energy increases as height increases. 
20. Kinetic energy changes only if mass or velocity changes. 
21. Mechanical energy (PE + KE) does not change for a free falling mass or a swinging pendulum. (when ignoring air friction) 
22. A coulomb is charge, an amp is current [coulomb/sec] and a volt is potential difference [joule/coulomb]. 
23. Short, fat, cold wires make the best conductors. 
24. Electrons and protons have equal amounts of charge (1.6 x 10-19 coulombs each - known as one elementary charge). This is on the Reference Chart. 
25. Adding a resistor in series increases the total resistance of a circuit. 
26. Adding a resistor in parallel decreases the total resistance of a circuit. 
27. All resistors in series have equal current (I). 
28. All resistors in parallel have equal voltage (V). 
29. If two similar charged spheres touch each other add the charges and divide by two to find the final charge on each sphere after they are separated. 
30. Insulators contain no electrons free to move. 
31. Ionized gases conduct electric current using positive ions, negative ions and electrons. 
32. Electric fields all point in the direction of the force on a positive test charge. 
33. Electric fields between two parallel plates are uniform in strength except at the edges. 
34. Millikan determined the charge on a single electron using his famous oil-drop experiment. 
35. All charge changes result from the movement of electrons not protons. (an object becomes positive by losing electrons) 
36. The direction of a magnetic field is defined by the direction a compass needle points. (The direction an isolated north pole would feel.) 
37. Magnetic fields point from the north to the south outside the magnet and south to north inside the magnet. 
38. Magnetic flux is measured in webers. 
39. Left hands are for negative charges and reverse answer for positive charges. 
40. The first hand rule deals with the B-field around a current bearing wire, the third hand rule looks at the force on charges moving in a B-field, and the second hand rule is redundant. 
41. Solenoids are stronger with more current or more wire turns or adding a soft iron core. 
42. Sound waves are longitudinal and mechanical. 
43. Light slows down, bends toward the normal and has a shorter wavelength when it enters a medium with a higher index of refraction (n). 
44. All angles in wave theory problems are measured to the normal. 
45. Blue light has more energy, a shorter wavelength and a higher frequency than red light (remember- ROYGBIV). 
46. The electromagnetic spectrum (radio, infrared, visible. Ultraviolet x-ray and gamma) are listed lowest energy to highest. They are all electromagnetic and travel at the speed of light (c = f ! l ). 
47. The speed (c) of all types of electromagnetic waves is 3.0 x 108 m/sec in a vacuum. 
48. As the frequency of an electromagnetic wave increases its energy increases (E = h ! f) and its wavelength decreases and its velocity remains constant as long as it doesn't enter a medium with a different refractive index (i.e. optical density). 
49. A prism produces a rainbow from white light by dispersion. (red bends the least because it slows the least). 
50. Transverse wave particles vibrate back and forth perpendicular to the direction of the wave's velocity. Longitudinal wave particles vibrate back and forth parallel to the direction of the wave's velocity. 
51. Light wave are transverse (they, and all (and only)transverse waves can be polarized).
52. The amplitude of a non-electromagnetic wave (i.e. water, string and sound waves) determines its energy. The frequency determines the pitch of a sound wave. Their wavelength is a function of its frequency and speed (v = f ! l ). Their speed depends on the medium they are traveling in. 
53. Constructive interference occurs when two waves are zero (0) degrees out of phase or a whole number of wavelengths (360 degrees.) out of phase. 
54. At the critical angle a wave will be refracted to 90 degrees. At angles larger than the critical angle, light is reflected not refracted. 
55. Doppler effect: when a wave source moves toward you, you will perceive waves with a shorter wavelength and higher frequency than the waves emitted by the source. When a wave source moves away from you, you will perceive waves with a longer wavelength and lower frequency. 
56. Double slit diffraction works because of diffraction and interference. 
57. Single slit diffraction produces a much wider central maximum than double slit. 
58. Diffuse reflection occurs from dull surfaces while regular (spectacular) reflection occurs from smooth (mirror-like) surfaces. 
59. Only waves show diffraction, interference and the polarization. 
60. The period of a wave is the inverse of its frequency (T = 1/f ). So waves with higher frequencies have shorter periods. 
61. Monochromatic light has one frequency. 
62. Coherent light waves are all in phase. 
63. In order to explain the photoelectric effect, Einstein proposed particle behavior for light (and all electromagnetic waves) with E = h f and KEmax = hf – Wo. 
64. A photon is a particle of light (wave packet). 
65. To preserve the symmetry of the universe, DeBroglie proposed wave behavior for particles ( l = h/mv). Therefore large fast moving objects (baseballs, rockets) have very short wavelengths (that are unobservable) but very small objects, particularly when moving slowly have wavelengths that can be detected in the behavior of the objects. 
66. Whenever charged particles are accelerated, electromagnetic waves are produced. 
67. The lowest energy state of a atom is called the ground state. 
68. Increasing light frequency increases the kinetic energy of the emitted photo-electrons in the photo-electric effect (KEmax = hf – Wo). 
69. As the threshold frequency increases for a photo-cell (photo emissive material) the work function also increases (Wo = h fo) 
70. Increasing light intensity increases the number of emitted photo-electrons in the photo-electric effect but not their KE (i.e. more intensity>more photons>more electrons emitted). This is the particle nature shown by light. 
71. Key to understanding trajectories is to separate the motion into two independent components in different dimensions - normally horizontal and vertical. Usually the velocity in the horizontal dimension is constant (not accelerated) and the motion in the vertical dimension is changing (usually with acceleration of g). 
72. Centripetal force and centripetal acceleration vectors are toward the center of the circle- while the velocity vector is tangent to the circle. (Centripetal means towards the center!) 
73. An object in orbit is not weightless - it is its weight that keeps it moving in a circle around the astronomical mass it is orbiting. In other words, its weight is the centripetal force keeping it moving in a circle. 
74. An object in orbit is in free fall - it is falling freely in response to its own weight. Any object inside a freely falling object will appear to be weightless. 
75. Rutherford discovered the positive nucleus using his famous gold-foil experiment. 
76. Fusion is the process in which hydrogen is combined to make helium. 
77. Fission requires that a neutron causes uranium to be split into middle size atoms and produce extra neutrons, which, in turn, can go on and cause more fissions. 
78. Radioactive half-lives are not effected by any changes in temperature or pressure (or anything else for that matter). 
79. One AMU of mass is equal to 931 meV of energy. (E = mc2). This is on the Reference Charts! 
80. Nuclear forces are very strong and very short-ranged. 
81. There are two basic types of elementary particles: Hadrons & Leptons (see Chart). 
82. There are two types of Hadrons: Baryons and Mesons (see Chart). 
83. The two types of Hadrons are different because they are made up of different numbers of quarks. Baryons are made up of 3 quarks, and Mesons of a quark and antiquark.
84. Notice that to make long-lived Hadron particles quarks must combine in such a way as to give the charge of particle formed a multiple of the elementary charge. 
85. For every particle in the "Standard Model" there is an antiparticle. The major difference of an antipartcle is that its charge is opposite in sign. All antiparticles will anhililate as soon as they come in contact with matter and will release a great amount of energy. 
85. Notice that to make long-lived Hadron particles quarks must combine in such a way as to give the charge of particle formed a multiple of the elementary charge. 
86. Notice that the retention of the Energy Level Diagrams on the new charts implies that there will be questions on it. The units (eV) can be converted to Joules with the coversion given on the first Chart of the Regents Reference tables. And can be used with the formula (given under Modern Physics formulas) to calculate the energy absorbed or released when the electron changes levels. 
87. Because of differences in gravity, a 200 pound person would only weigh 76 pounds on Mars. More gravity facts. 
88. Electric eels can stun both predators and prey with electric shocks of around 500 volts. More electricity facts. 
89. Energy from food is usually measured in joules or calories. More energy facts. 
90. Light from the Earth takes just 1.255 seconds to reach the Moon. More light facts. 
91. Sound travels at a speed of around 767 miles per hour (1,230 kilometres per hour). More sound facts. 
92. When traveling at 80 kilometres per hour (50 miles per hour), cars use around half of their fuel just to overcome wind resistance. 
93. Water can work against gravity, moving up narrow tubes in a process called capillary action. 
94. A magnifying glass uses the properties of a convex shaped lens to magnify an image, making it easier to see. 
95. A scientist who studies physics is known as a physicist. 
96. Uranus is the only planet in our solar system that rolls on its side like a barrel, while Venus is the only planet that spins in the opposite direction to Earth. 
97. The fastest land animal in the world is the Cheetah, clocking a max speed of around 113 km per hour (70 mph). 
98. 1921 Nobel Prize in Physics was won by Albert Einstein for his work in the field of theoretical physics.
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Published November 21, 2016 by Knowminfo with 0 comment

Mathematics Facts

1. It is believed that Ancient Egyptians used complex mathematics such as algebra, arithmetic and geometry as far back as 3000 BC. 
2. It wasn’t until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming. 
3. What comes after a million, billion and trillion? Why a quadrillion, quintillion, sextillion, septillion, octillion and nonillion of course. 
4. Cutting a cake into 8 pieces is possible with just 3 slices, can you work out how? 
5. An icosagon is a shape with 20 sides. 
6. A three dimensional parallelogram is called a parallelepiped. 
7. Trigonometry is the study of the relationship between the angles of triangles and their sides. 
8. The smallest ten prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29. 
9. The name of the popular search engine ‘Google’ came from a misspelling of the word ‘googol’, which is a very, very large number (the number one followed by one hundred zeros to be exact). 
10. A ‘googolplex’ is the number 1 followed by a googol zeros, this number is so big that it can’t be written because there isn’t enough room in the universe to fit it in! It would also take a length of time far greater than the age of the universe just to write the numbers. 
11. The number Pi (the ratio of the circumference to the diameter of a circle) can’t be expressed as a fraction, this means it is an irrational number. When written as a decimal it never repeats and never ends. 
12. Here is Pi written to 50 decimal places: 3.14159265358979323846264338327950288419716939937510
13. If two quantities have a ratio of approximately 1.618, they are said to be in the golden ratio. This ratio has been used throughout history to design aesthetically pleasing art works such as the Parthenon. It also appears in paintings, music, the design of books, and even in nature. 
14. π=3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 32823 ... 
15. A sphere has two sides. However, there are one-sided surfaces. 
16. There are shapes of constant width other than the circle. One can even drill square holes. 
17. There are just five regular polyhedra 
18. In a group of 23 people, at least two have the same birthday with the probability greater than 1/2 
19. Everything you can do with a ruler and a compass you can do with the compass alone 
20. Among all shapes with the same perimeter a circle has the largest area. 
21. There are curves that fill a plane without holes 
22. Much as with people, there are irrational, perfect, complex numbers 
23. As in philosophy, there are transcendental numbers 
24. As in the art, there are imaginary and surreal numbers 
25. A straight line has dimension 1, a plane - 2. Fractals have mostly fractional dimension 
26. You are wrong if you think Mathematics is not fun 
27. Mathematics studies neighborhoods, groups and free groups, rings, ideals, holes, poles and removable poles, trees, growth ... 
28. Mathematics also studies models, shapes, curves, cardinals, similarity, consistency, completeness, space ... 
29. Among objects of mathematical study are heredity, continuity, jumps, infinity, infinitesimals, paradoxes... 
30. Last but not the least, Mathematics studies stability, projections and values, values are often absolute but may also be extreme, local or global. 
31. Trigonometry aside, Mathematics comprises fields like Game Theory, Braids Theory, Knot Theory and more 
32. One is morally obligated not to do anything impossible 
33. Some numbers are square, yet others are triangular 
34. The next sentence is true but you must not believe it 
35. The previous sentence was false 
36. 12+3-4+5+67+8+9=100 and there exists at least one other representation of 100 with 9 digits in the right order and math operations in between 
37. One can cut a pie into 8 pieces with three movements 
38. Program=Algorithms+Data Structures 
39. There is something the dead eat but if the living eat it, they die. 
40. A clock never showing right time might be preferable to the one showing right time twice a day 
41. Among all shapes with the same area circle has the shortest perimeter
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Saturday, November 19, 2016

Published November 19, 2016 by Knowminfo with 0 comment

Surf Anonymous using Tor

Have you ever wanted to browse the Internet anonymously? The  truth is that browser settings such as "incognito mode" or"private window" don't quite cut it. If you want real anonymity

Tor is an Internet networking protocol designed to anonymize the data relayed across it. Using Tor's software will make conceal a user's location and usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it more difficult for Internet activity to be traced back to the user, this includes visiting  Web sites, online posts, instant messages, and other communication forms. Tor's use is intended to protect the personal privacy of users, as well as their freedom and ability to conduct confidential communication by keeping their Internet activities from being monitored.
The Tor network runs through the computer servers of thousands of volunteers spread throughout theworld. Your data is bundled into an encrypted packet when it enters the Tor network. Then, unlike the case with normal Internet connections, Tor strips away part of the packet's header, which is a part of the addressing information that could be used to learn things about the sender.Finally, Tor encrypts the rest of the addressing information, called the packet wrapper. Regular Internet connections don't do this either. The modified and encrypted data packet is then routed through many of these servers, called relays, on the way to its final destination.

Each relay decrypts only enough of the data packet wrapper to know which relay the data came from, and which relay to send it tonext. The relay then rewraps the package in a new wrapper and sends it on.The layers of encrypted address information used to anonymize data packets sent through Tor are reminiscent of an onion, hence the name. That way a data packet's path through the Tor network cannot be fully traced.Some regular Internet data packets are encrypted using a protocol called Secure Socket Layer (SSL) or its newer, stronger cousin Transport Layer Security (TLS). For example, if you submit your credit card information to an online store, that information travels across the network in an encrypted state to prevent theft.However, even when you use SSL or TLS, it's still possible for othersto intercept those packets and see the information's metadata —who sent that encrypted information and who received it —because the addressing wrappersin SSL or TLS are not encrypted. In Tor, they are, which hides the sender and receiver of a given transmission.

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Wednesday, November 2, 2016

Published November 02, 2016 by Knowminfo with 0 comment

Top 10 super computers in the world

1. Sunway TaihuLight Located in the National Supercomputing Center in Wuxi, China, this is the new world leader in supercomputing as of June 2016. Its architecture is remarkable in that it was built entirely using processors designed and made in China, while the Tianhe-2 was Intel-based. It consists of Sunway MPP and Sunway SW26010 260C 1.45GHz and was built by China’s National Research Center of Parallel Computer Engineering and Technology (NRCPC).It features 10,649,600 cores, has an Rmax of 93,014.6 TerraFlops/s, Rpeak of 125,435.9 TerraFlops/s and uses only 15,371 kW of power. In other words, it is twice as fast and three times as efficient as the previous record holder.

2. Tianhe-2 (MilkyWay-2)Located in the National Super Computer Center in Guangzhou, China, this was the world’s former reigning champion. Its architecture consists of TH-IVB-FEP Cluster, Intel Xeon E5-2692 12C 2.200GHz, TH Express-2, Intel Xeon Phi 31S1P and was built by the Chinese National University of Defense Technology.It features 3,120,000 cores, has a Rmax of 33,862.7 TerraFlops/s, Rpeak of 54,902.4 TerraFlops/s and uses 17,808 kW of power.

3. Titan Located in the Oak Ridge National Laboratory in Oak Ridge, Tennessee, it is the second supercomputer operated for the American DOE SC, and the most powerful supercomputer built by Cray Inc. Its architecture consists of Cray XK7, Operate on 6274 16C 2.200GHz, Cray Gemini interconnect and NVIDIA K20x.It features 560,640 cores, has an Rmax of 17,590.0 TerraFlops/s, Rpeak of 27,112.5 TerraFlops/s and uses 8,209 kW of power.

4. Sequoia Located in the Livermore California and once again operated for the U.S. DOE NNSA, the Sequoia is the second supercomputer on the list built by IBM. Its architecture consists of BlueGene/Q, and Power BQC 16C 1.60 GHz. It features 1,572,864 cores, has an Rmax of 17,173.2 TerraFlops/s, Rpeak of 20,132.7 TerraFlops/s and uses 7,890 kW of power.

5. K computer The K computer – named for the Japanese word “kei”(京), meaning 10 quadrillion(1016) is located at the RIKEN Advanced Institute for Computational Science (AICS) in Japan. Its architecture consists of SPARC64 VIIIfx 2.0GHz, Tofu interconnect and was built by Fujitsu.It features 705,024 cores, has an Rmax of 10,510.0 TerraFlops/s, Rpeak of 11,280.4 TerraFlops/s and uses 12,660 kW of power.

6. Mira Located in the Argonne National Laboratory near Lemont, Illinois, outside Chicago and operated for the American Department of Energy Office of Science (SC), Mira is the first supercomputer on our list not built by Cray.Its architecture consists of BlueGene/Q, Power BQC 16C 1.60GHz, and was built by IBM. It features 786,432 cores, has an Rmax of 8,586.6 TerraFlops/s, Rpeak of 10,066.3 TerraFlops/s and uses 3,945 kW of power.

7. Trinity The Trinity supercomputer is managed and operated by Los Alamos National Laboratory and Sandia National Laboratories, a contractor for the U.S. Department of Energy’s National Nuclear Security Administration (NNSA) and is located in Los Alamos, New Mexico. Its architecture consists of Cray XC40, Xeon E5-2698v316C 2.3GHz, Aries interconnect.It features 301,056 cores, has an Rmax of 8,100.9 TerraFlops/s, Rpeak of 11,078.9 TerraFlops/s and has an undisclosed power usage.

8. Piz Daint Located in the Swiss National Supercomputing Centre (CSCS) in Switzerland and named after a mountain of the Swiss Ortler Alps, Piz Daint’s architecture consists of Cray XC30, XeonE5-2670 8C 2.600GHz, Ariesinter connect, NVIDIA K20x and is the third supercomputer on this list built by Cray Inc.It features 115,984 cores, has an Rmax of 6,271.0 TerraFlops/s, Rpeak of 7,788.9 TerraFlops/s and uses 2,325 kW of power.

9. Hazel Hen Located in the HLRS – Höchstleistungsrechenzentrum (High Performance Computing Center) in Stuttgart, Germany, the Hazel Hen is built on Cray XC40, Xeon E5-2680v3 12C 2.5GHz, and Aries interconnect (similar to the Shaheen II) and was also built by Cray Inc.It features 185,088 cores, but performs better than theShaheen II at an Rmax of 5,640.2 TerraFlops/s, Rpeak of 7,403.5 TerraFlops/s.

10. Shaheen II Located in the King Abdullah University of Science and Technology in Saudi Arabia, the Shaheen II(not to be confused with the land-based supersonic surface-to-surface medium-range guided ballistic missile) relies on an architecture consisting of Cray XC40, Xeon E5-2698v316C 2.3GHz, and Aries interconnect.Like several others on the list,which was compiled by Top500, it was built by CrayInc., an American supercomputer manufacturer headquartered in Seattle, Washington. It features 196,608 cores, has an Rmax of 5,537.0 TerraFlops/s, Rpeak of 7,235.2 TerraFlops/s and uses 2,834 kW of power.

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Published November 02, 2016 by Knowminfo with 7 comments

Make money just by unlocking your phone


Slidejoy is an app pays you money in exchange for viewing advertisements on your lock screen. You don't have to engage with the ads! just use your phone as usual. 

The app gives you 2 ways to unlock your phone: - Sliding right will take you to your home screen.Use your phone as you normally would swipe on the ad (left or right) instead of bypassing the lock screen by pressing the home button. app learns about your preferences and will show you more ads similar to the ones for which you slide left. if you use your home button to bypass the Slidejoy lock screen instead of swiping left or right on the ad, you will not be able to earn your maximum amount.Also, it has also offer wall, you will be able to earn more through the offer wall (app downloads, surveys, account signups, etc.) you can redeem by PayPal or by other gift cards. 

To redeem the amount you need to have certain carats/points which you get by the ads on the lock screen and by the offer wall the carats will be updated at night, its the easy way to get income by doing nothing. you just use your smartphone as usual and the carats keep adding up and will be updated at night. and many have earned through it so its not a fake app just give it a try.

Visit here video
To Download slidejoy visit here.
To know more visit here 
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