Physics ---------------- |
| Physics Facts |
| 1.Due to gravity, the maximum speed a raindrop during a rain with falling speed can hit you is about 18 miles per hour (29 kilometers per hour). 2.The speed of light in meters is 299,792,458 meters per second. And how on Earth are you going to remember that? The number can be remembered from the number of letters in each word of the following phrase: "We guarantee certainty, clearly referring to this light mnemonic." (The speed of light in miles per second is 186,282.397051221, or in miles per hour, 670,616,629.384395). 3.In air, at a temperature of 32 degrees Fahrenheit/0 degrees Celsius (freezing point of water) the speed of sound travels 1,087 feet (331 meters) per second. (It travels faster at higher temperatures). (In 64 degrees Fahrenheit [18 degrees Celsius] the speed of sound travels 1,123 feet [342 meters] per second). 4.If an object floats on water, it displaces the water equal to its mass, but if the object sinks, it displaces water equal to its volume. 5.A calorie is defined as the amount of energy needed to raise one gram of water one degree Celsius (or from 14.5 degrees Celsius to 15.5 degrees Celsius). 6.The length of light that can travel in a year is around 5,865,696,000,000 miles, which is called a light-year. This calculation is pending that a year has 365 days of 24 hours only! 7.In a cyclotron an electric field is used to bend the path of a particle into a circle so that it passes repeatedly through the same electric field. 8.One of the lowest actual temperature ever reached was two-billionth of a degree above absolute zero by a team at the Low Temperature Laboratory in the Helsinki University of Technology, Finland, in October 1989. 9.The cyclotron was invented by Ernest Lawrence at the University of California, Berkeley, in 1934 to study the nuclear structure of the atom. 10.The first person to break the sound barrier was Charles E. Yeager on October 14, 1947. He flew a Bell X-1, attaining a speed of 750 miles per hour (1,207 kilometers per hour) (Mach 1.06) and an altitude of 70,140 feet (21,739 meters) over the town of Victorville, California. 11.The first woman to break the sound barrier was Jacqueline Cochran on May 18, 1953. She flew a North American F-86 Saber over Edwards Air Force Base in California, attaining the speed of 760 miles per hour (1,223 kilometers per hour). 12.The highest man-made temperature was achieved by the JT-60 (JAERI Tokamak-60) reactor at the Naka Fusion Research Establishment, Nakamachi, Ibaraki prefecture, Japan, on July 19, 1996, at 520 million degrees Kelvin. 13.The lowest man-made temperature was done by a team at the University of Colorado, led by Eric Cornell and Carl Wieman in July 14, 1995. In the university laboratory, they cooled atoms of rubidium to a temperature of less than 170 billionths of a degree above absolute zero. 14.The smallest thermometer in the world was made on February 7, 2002 by Yihua Gao and Yoshio Rando (both Japan) of the National Institute for Materials Science. It is around 10,000 nanometers long and 75 nanometers wide. 15.The shortest flash of light was done by a team of European physicist at the Vienna Institute of Technology, Austria, on August 16, 2002. It was an X-ray light for a 500 billion billionth of a second (500 attoseconds) long. 16.The Celsius scale was originally set by Anders Celsius in 1742 for water to boil at 0 degrees and freeze at 100 degrees. It was Carolus Linnaeus who reversed this scale, but a later textbook attributed the modified scale to Celsius and the name has remained. 17.The first national physics society in the United States was the American Physical Society, organized at Columbia University in New York City on May 20, 1899. Their first president was Henry Augustus Rowland. 18.The first laser was constructed in 1960 by Theodore Maiman of the Hughes Research Laboratory in California, U.S.A. 19.To hit a baseball hard enough to travel around the world, the ball would have to be hit at 7.9 kilometers per second, or 17,800 miles per hour. At this rate, the baseball will orbit the Earth in around 84 minutes. 20.The lowest temperature ever achieved is 0.000000003 Kelvin, three nanoKelvin above absolute zero. It was reached using rarified gas composed of 85 rubidium which at these low temperatures form a Bose-Einstein condensate, achieved by a team of scientists led by Elizabeth Donley from the University of Colorado, Boulder, Colorado, U.S.A., and the National Institute of Science and Technology, Boulder, Colorado, U.S.A. Their work was announced in Nature on July 19, 2001. 21.The speed of sound travels through ice-cold vapor at approximately 4,708 feet per second, ice-cold water at 4,938 feet per second, granite at 12,960 feet per second, hardwood at 12,620 feet per second, brick at 11,960 feet per second, glass at 16,410 to 19,690 feet per second, gold at 5,717 feet per second, and silver at 8,658 feet per second. 22.The first person to measure the speed of light was Ole Romer, who's values are too slow by today's standards. 23.The Petawatt, the world's most powerful laser, generates 1,200 times as much power as the entire electrical grid of the U.S. When focused on platinum, it turns it into gold. |
| Here are some physics facts. I will be adding more. |