hydrodynamic second sound
21Propeller — A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a mass such as water or air, by rotating two or more twisted… …
22Shaped charge — Sectioned high explosive anti tank round with the inner shaped charge visible …
23Carl Eckart — Carl Henry Eckart (May 4, 1902 in St. Louis, Missouri ndash; October 23, 1973 in La Jolla, California) was an American physicist, physical oceanographer, geophysicist, and administrator. He co developed the Wigner Eckart theorem and is also known …
24Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
25Acoustic microscopy — Introduction = Acoustic microscopes employ very high or ultra high frequency ultrasound. These microscopes operate nondestructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks,… …
26Lubricant — A lubricant is a substance introduced to reduce friction between moving surfaces. It may also have the function of transporting foreign particles and of distributing heat. The property of reducing friction is known as lubricity. A good lubricant… …
27X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …
28John Scott Russell — Infobox Engineer image size = caption = John Scott Russell name = John Scott Russell nationality = Scottish birth date = 1808 05 09 birth place = Parkhead, Glasgow death date = 1882 06 08 death place = Ventnor, Isle of Wight education = Edinburgh …
29Smoothed particle hydrodynamics — (SPH) is a computational method used for simulating fluid flows. It has been used in many fields of research, including astrophysics, ballistics, vulcanology and oceanology. It is a mesh free Lagrangian method (where the co ordinates move with… …
30Helmholtz, Hermann von — ▪ German scientist and philosopher Introduction original name Hermann Ludwig Ferdinand Helmholtz born Aug. 31, 1821, Potsdam, Prussia [Germany] died Sept. 8, 1894, Charlottenburg, Berlin, Ger. German scientist and philosopher who made… …
