molecules collide
91Herschbach , Dudley Robert — (1932–) American chemist Herschbach, who was born in San José, California, was educated at the University of Stanford and at Harvard University, where he gained his PhD in 1958. After teaching at the University of California, Berkeley for four… …
92Future of an expanding universe — Big Freeze redirects here. For other uses, see Big Freeze (disambiguation). Physical cosmology Univ …
93Electromagnetic radiation — Electromagnetism Electricity · …
94Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …
95Ultra high vacuum — (UHV) is the vacuum regime characterised by pressures lower than about 10−7 pascal or 100 nanopascals ( 10−9 torr). UHV requires the use of special materials in creating the vacuum system, extreme cleanliness to maintain the vacuum system, and… …
96CHON — Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulfur CHON (or CHNOPS) is an mnemonic acronym for the four most common (or six most essential) elements in living organisms: carbon, hydrogen, oxygen, and nitrogen. Thes …
97Fluid mechanics — Continuum mechanics …
98Helium mass spectrometer — A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment… …
99Doppler cooling — is a mechanism that can be used to trap and cool atoms. The term is sometimes used synonymously with laser cooling, though laser cooling includes other techniques. Contents 1 History 2 Brief Explanation 3 Detailed Explanation …
100Mars — /mahrz/, n. 1. the ancient Roman god of war and agriculture, identified with the Greek god Ares. 2. Astron. the planet fourth in order from the sun, having a diameter of 4222 miles (6794 km), a mean distance from the sun of 141.6 million miles… …
