Speed o soond

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The speed o soond is the distance traveled per unit time bi a soond wave propagatin throu an elastic medium. In dry air at 20 °C (68 °F), the speed o soond is 343.2 metres per seicont (1,126 ft/s; 1,236 km/h; 768 mph; 667 kn), or a kilometre in 2.914 s or a mile in 4.689 s.