Computer Science – Sound
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977amsci..65..473g&link_type=abstract
American Scientist, vol. 65, July-Aug. 1977, p. 473-481. Research supported by the National Research Council, Transportation De
Computer Science
Sound
Astrophysics, Shock Fronts, Shock Waves, Abiogenesis, Bow Waves, Detonation Waves, Explosions, Lightning, Plane Waves, Sound Waves, Tsunami Waves
Scientific paper
Experimental and natural shock waves are discussed. Shock waves can move freely in their respective gases, or shock waves can be attached to an object moving through a gas at a speed exceeding that of sound in the gas. Sequential steps of the former type of shock waves are portrayed for the cases of artificial lightning simulated along a copper wire and of a shock wave moving at a Mach number of 18.8 into argon at an initial pressure of 1.57 torr and a temperature of 295 K. Also analyzed are shock waves in space and shock waves associated with explosions. It is suggested that, at an earlier time in the earth's evolution, shock waves caused by volcanoes, meteorites, or bubble collapse in ocean waves might have been responsible for the synthesis of high-molecular-weight organic compounds from primordial precursor compounds, so that shock waves might have played a role in the origin of life.
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