the temperature-pressure relation
31Human impacts on the nitrogen cycle — Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation (Galloway 2003). As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over… …
32work, history of the organization of — Introduction history of the methods by which society structures the activities and labour necessary to its survival. work is essential in providing the basic physical needs of food, clothing, and shelter. But work involves more than the use …
33Discovery Channel Young Scientist Challenge — The Discovery Channel Young Scientist Challenge (DCYSC) is an annual science and engineering research and exhibit competition for students in grade 5 through 8 and was created in 1999. It is sponsored primarily by Discovery Communications,… …
34Saturn — /sat euhrn/, n. 1. an ancient Roman god of agriculture, the consort of Ops, believed to have ruled the earth during an age of happiness and virtue, identified with the Greek god Cronus. 2. Astron. the planet sixth in order from the sun, having an …
35Homogeneous charge compression ignition — Thermodynamics …
36Conjugate variables (thermodynamics) — For a more general mathematical discussion, see Conjugate variables. Thermodynamics …
37Tunable diode laser absorption spectroscopy — (TDLAS) is a technique for measuring the concentration of certain species such as methane, water vapor and many more, in a gaseous mixture using tunable diode lasers and laser absorption spectrometry. The advantage of TDLAS over other techniques… …
38Stoichiometry — (  /ˌstɔɪ …
39Heat capacity ratio — The heat capacity ratio or adiabatic index or ratio of specific heats, is the ratio of the heat capacity at constant pressure (C P) to heat capacity at constant volume (C V). It is sometimes also known as the isentropic expansion factor and is… …
40Combined gas law — The combined gas law is a gas law which combines Charles s law, Boyle s law, and Gay Lussac s law. These laws each relate one thermodynamic variable to another mathematically while holding everything else constant. Charles s law states that… …
