specific gas discharge
71Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is …
72Gun laws in the United States (by state) — U.S. Firearms Legal Topics Assault weapons ban ATF Bureau Brady Handgun Violence Prevention Act Concealed carry in the U.S. Domestic Violence Offender Gun Ban …
73Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
74Nickel–cadmium battery — From top to bottom – Gumstick , AA, and AAA Ni–Cd batteries. specific energy 40–60 W·h/kg energy density 50–150 W·h/L specific power 150& …
75environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
76Choked flow — is a compressible flow effect. The parameter that becomes choked or limited is the velocity or the mass flow rate. Choked flow is a fluid dynamic condition associated with the Venturi effect. When a flowing fluid at a given pressure and… …
77Low-temperature thermal desorption — NOTE: This article is largely taken verbatim from the EPA s How to Evaluate Alternative Cleanup Technologies for Underground Storage Tank Sites . cite web last = first = authorlink = coauthors = date = url = http://www.epa.gov/OUST/cat/lttd.htm… …
78digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
79fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …
80Battery (electricity) — For other uses, see Battery (disambiguation). Various cells and batteries (top left to bottom right): two AA, one D, one handheld ham radio battery, two 9 volt (PP3), two AAA, one C, one …
