what is the speed of sound in vulcanised rubber...??
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Young's modulus for rubber Y = 4 * 10^6 N/m^2 and density d = 1.2 or so.. Then speed of sound in rubber = squareRoot(Y / d) = 57.7 m/sec. This is much smaller than the speed of sound in air. Vulcanized rubber is soft.
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the young modulus of rubber is y=4 10^6n/m2
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