speed and sound define
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The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.At 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s.
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sound is a form of energy which enable us to hear and speed is scaler quantity which enable to rate someone to operate
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