random thermal motion
21Work content — In thermodynamic analysis of chemical reactions, the term free energy denotes either of two related concepts of importance expressing the total amount of energy which is used up or released during a chemical reaction. Both attempt to capture that …
22Acoustic impedance — The acoustic impedance Z (or sound impedance) is a frequency f dependent parameter and is very useful, for example, for describing the behaviour of musical wind instruments. Mathematically, it is the sound pressure p divided by the particle… …
23Richardson, Lewis Fry — ▪ British physicist born Oct. 11, 1881, Newcastle upon Tyne, Northumberland, Eng. died Sept. 30, 1953, Kilmun, Argyll, Scot. British physicist and psychologist who was the first to apply mathematical techniques to predict the weather… …
24Chu , Steven — (1948–) American physicist Chu was educated at the University of California, Berkeley, where he obtained his PhD in 1976. He joined Bell Labs in 1978 and, in 1987, took up an appointment as professor of applied physics at Stanford University,… …
25doppler broadening — ˈdäplə(r) noun Usage: usually capitalized D Etymology: after Christian J. Doppler died 1853 Austrian physicist : a lack of sharpness in the spectrum lines of gases due to the Doppler effect of the random thermal motion of the molecules …
26Equipartition theorem — [ Thermal motion of an α helical peptide. The jittery motion is random and complex, and the energy of any particular atom can fluctuate wildly. Nevertheless, the equipartition theorem allows the average kinetic energy of each atom to be computed …
27cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …
28Diffusion — This article is about the generic concept of the time dependent random process. For other uses, see Diffusion (disambiguation). Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of… …
29Convective heat transfer — See also: Heat transfer and convection This figure shows a calculation for thermal convection. Colors closer to red are hot areas and colors closer to blue are cold areas. In this figure, a hot, less dense lower boundary layer sends plumes… …
30magnetism — /mag ni tiz euhm/, n. 1. the properties of attraction possessed by magnets; the molecular properties common to magnets. 2. the agency producing magnetic phenomena. 3. the science dealing with magnetic phenomena. 4. strong attractive power or… …
