define supersonic speed
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The speed of sound in that medium is c. To explain it simply, the speed of sound can be equated to Mach 1 speed. Thus, Mach 0.75 will be 75% of the speedof sound that is also called subsonic and Mach 1.65 will be 65% faster than the speed of light which is also called supersonic
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Supersonic speed is the speed of an object that exceeds the speed of sound. For objects traveling in dry air of a temperature of 20 °C at sea level, this speed is approximately 343.2 m/s. Speeds greater than five times the speed of sound are often referred to as hypersonic.
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