1.

The young's modulus of steel is 20 xx 10^(10) N/m^(2) . If the density of steel is 7.7xx10^(3) kg/m^(2), the velocity of longitudinal wave in steel is nearly :

Answer»

50 m/s.
500 m/s
5000 m/s
50,000 m/s.

Solution :`v - sqrt((Y)/(RHO))`
` = sqrt((20 xx 10^(10))/(7.7 xx 10^(3))) = 5345 ms^(-1) = 5000` m/s
`hence the correct choice is (C).


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