collision diameter of molecules
1collision diameter — Physics. the distance between the centers of two colliding molecules when at their closest point of approach. * * * …
2collision diameter — Physics. the distance between the centers of two colliding molecules when at their closest point of approach …
3gas — gasless, adj. /gas/, n., pl. gases, v., gassed, gassing. n. 1. Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. 2. any such fluid or mixture of fluids. 3. any… …
4Viscosity — For other uses, see Viscosity (disambiguation). Viscosity The substance above has lower viscosity than the substance below SI symbol: μ, η SI unit: Pa·s  …
5Mass diffusivity — This article is about coefficient of molecular diffusion of mass. For other uses, see Diffusivity (disambiguation). Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the… …
6HEPA — A high efficiency particulate air or HEPA [ [http://www.eh.doe.gov/hepa/ High Efficiency Particulate Arresting Filters] ] (IPAEng|ˈhɛpə) filter is a type of high efficiency air filter.FunctionHEPA filters can remove at least 99.97% of particles 0 …
7Respirator — A respirator is a device designed to protect the wearer from inhaling harmful dusts, fumes, vapors, and/or gases. Respirators come in a wide range of types and sizes used by the military, private industry, and the public. Respirators range from… …
8Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
9Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
10spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
