Supersonics 101-Plus
Credit: SUPERSONIC AEROSPACE INTERNATIONAL CONCEPT
In the first paragraph of “Supersonics 101” (AW&ST Oct. 8, p. 50), Guy Norris writes: “The speed of sound varies with temperature and pressure.” Actually, the speed of sound in air is a function of temperature only. The speed of sound in air is a constant times the square root of the absolute...
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