sound-energy density
21Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …
22The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …
23Puget Sound environmental issues — articleissues POV = December 2007 copyedit = January 2007 citationstyle = October 2008The environmental health of Puget Sound, Washington has a diverse and complex history related to a long, involved relationship with marine and freshwater… …
24Dark energy star — A dark energy star is a hypothetical compact astrophysical object which a minority of physicists feel might constitute an alternative explanation for observations of astronomical black hole candidates. Dark energy is invisible to the human eye;… …
25Dark-energy star — A dark energy star is a hypothetical compact astrophysical object, which a minority of physicists feel might constitute an alternative explanation for observations of astronomical black hole candidates. Dark energy is invisible to the human eye;… …
26History of sound recording — Methods and media for sound recording are varied and have undergone significant changes between the first time sound was actually recorded for later playback until now. Technology Mechanical recording The first devices for recording sound were… …
27Apollo Energy Systems — Apollo Energy Systems, Inc is a US multinational alternative energy corporation headquartered in Pompano Beach, Florida that develops, produces and markets fuel cell power plants, electric propulsion systems, and alternative energy generation… …
28Audio power — Sound measurements Sound pressure p, SPL Particle velocity v, SVL Particle displacement ξ Sound intensity I, SIL Sound power Pac Sound power level SWL Sound energy Sound energy density …
29Schalldichte — tūrinis garso energijos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinė tam tikro tūrio garso energija, padalyta iš to tūrio. atitikmenys: angl. sound energy density; volumic sound energy vok. Schalldichte, f;… …
30Schallenergiedichte — tūrinis garso energijos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinė tam tikro tūrio garso energija, padalyta iš to tūrio. atitikmenys: angl. sound energy density; volumic sound energy vok. Schalldichte, f;… …
