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A copper rod of unit length held between...

A copper rod of unit length held between two rigid support is heated to bring a temperature change of `20^@c. "If" Y=1.3xx10^11N/m^2, alpha=1.7xx10^(-5) /^@`and `rho=9xx10^6g/m^3, then

A

The velocity of transverse wave is `70 ms^(-1)`

B

The fundamental frequency is 35 Hertz

C

It will have a frequency of 70 Hz with half-a- metre

D

Vibration cannot be observed

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