Physics Reference Libraries

Page 5 of about 84 Articles
2009-07-09 17:39:38

Americium is a synthetic radioactive metallic element. The symbol for Americium is Am and the atomic number is 95. Americium is an actinide that was first isolated by Glenn T. Seaborg in 1944 while attacking plutonium with neutrons. It became the fourth transuranic (having an atomic number greater than 92) element to be discovered. It was named for the Americas. It is widely used in commercial...

2014-01-12 00:00:00

Sample Entry: Astronomy is the scientific study of stars, planets, comets, galaxies, and other phenomena that occur outside Earth's atmosphere (e.g. cosmic radiation). Astronomy deals with the evolution, physics, chemical makeup, meteorology, and motion of celestial objects, and also the formation of the universe. The word Astronomy comes from the Greek words astron (meaning "star") and...

Physics Main
2009-05-28 16:17:41

Physics is the scientific study of matter and its motion through space/time and its derivitives, including energy and force. It is generally the analysis of nature and is conducted to help us understand how the universe behaves. Physics comes from the Greek word physis, meaning "nature". It is among the oldest academic disciplines, and perhaps the oldest pertaining to astronomy. Physics has...

IceCube Neutrino Observatory
2009-05-14 17:51:56

The IceCube Neutrino Observatory is a neutrino telescope that is currently being built at the Amundsen-Scott South Pole Station. IceCube is being constructed in deep Antarctic ice by deploying thousands of PMTs (photomultiplier tubes) at depths of 4750 to 8000 feet. These spherical optical sensors are deployed on strings of sixty modules each, into holes melted by hot water drilling. Since...

Tamm Igor Yevgenyevich
2009-04-28 16:45:23

Igor Yevgenyevich Tamm born in Vladivostok, Russia on July 8, 1895 was a Soviet physicist and mathematician. He studied at the University of Edinburgh in 1913-1914. He then switched to Moscow State University where he graduated in 1918. He developed an approximation method for many-body physics, in 1945. He worked with Andrei Dmitrievich Sakharov to create a tomohak system based on a...

Volta Alessandro Antonio Anastasio
2009-04-28 16:42:15

Count Alessandro Antonio Anastasio Volta was born on February 18, 1745 in Como, Duchy of Milan. At age 39, Volta became a professor at the Royal School in Como in the physics department. A year later, in 1775, Volta invented a device called the electrophorus which generates static electric charges. He marketed his creation so well, that he is often given credit as its inventor. However, a...

Alfvn Hannes
2013-03-16 00:00:00

Hannes Olof Gösta Alfvén (May 30, 1908 - April 2, 1995) was a Swedish plasma physicist born in Norrköping, Sweden. Alfvén received his PhD from the University of Uppsala in 1934. His thesis was titled "Investigations of the Ultra-short Electromagnetic Waves." He was originally trained as an electrical power engineer and later moved on to research and teaching in the fields of plasma...

Bohr Niels
2013-03-16 00:00:00

Niels Henrik David Bohr (October 7, 1885 - November 18, 1962) was a Danish physicist. He made essential contributions to understanding atom structure and quantum mechanics. Born in Copenhagen, Denmark to Christian Bohr and Ellen Adler, Bohr got his doctorate at Copenhagen University in 1911. He then studied under Ernest Rutherford in Manchester, England. Based on Rutherford's theories,...

2010-09-13 16:46:47

The cluster CL0024+17, located in Pisces, is a galaxy cluster that is allowing astronomers to probe the distribution of dark matter in space. Dark matter does not reflect light and therefore cannot be seen. It is only detectable by the way its gravity affects the lights around it. Using gravitational lensing astronomers observe the distorted light around the dark matter and are able to tell...

Water strider
2005-09-09 07:46:52

The Water strider, (also known as: Skater, Pond Skater, Jesus Bug, Water Skeeter, water scooter, water skater, and Skimmer) is any of a number of predatory insects in the family Gerridae that rely on the surface tension of water to walk on top of it. They live on the surface of ponds, slow streams, marshes, and other quiet waters and can move very quickly (up to 1 m/s) over the surface of...

Word of the Day
  • A person or thing gazed at with wonder or curiosity, especially of a scornful kind.
The 'stock' of 'gazingstock' comes from an Old English word meaning 'tree trunk' or 'wood'.