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What is the speed of sound?
asked Dec 14, 2010 by triuser (1,768 points)

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In dry air at 20 °C (68 °F), the speed of sound is 343.2 metres per second (1,126 ft/s). This is 1,236 kilometres per hour (768 mph), or about one kilometer in three seconds or approximately one mile in five seconds.
answered Dec 15, 2010 by trianswer (22,754 points)
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In dry air at 20 °C (68 °F), the speed of sound is 343.2 metres per second (1,126 ft/s). This is 1,236 kilometres per hour (768 mph), or about one kilometer in three seconds or approximately one mile in five seconds.
answered Dec 15, 2010 by trianswer (22,754 points)

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