Calculate the speed of sound in a steel rod whose Young's modulus Y = 2 xx 10^(11) N m^(-2) and rho = 7800 kg m^(-3)

Calculate the speed of sound in a steel rod whose Young's modulus Y =

1.	Calculate the speed of sound in a steel rod whose Young's modulus Y = 2 xx 10^(11) N m^(-2) and rho = 7800 kg m^(-3)
Answer» Solution :`V = SQRT((Y)/(rho)) = sqrt((2 xx 10^(11))/(7800)) = sqrt(0.2564 xx 10^(8)) = 0.506 xx 10^(4) ms^(-1) = 5 xx 10^(3) ms^(-1)` Therefore , longitudinal waves travel faster in a solid than in a LIQUID or a gas . Now you may understand why a SHEPHERD checks before crossing railway track by keeping his ears on the rails to SAFEGUARD his cattle .