Question

1. Tension due to thermal stresses,
[
begin{array}{l}
T=Y A alpha cdot Delta theta
v=sqrt{frac{T}{mu}}
end{array}
]
Here, ( mu= ) mass per unit length.
[
=rho A
]
[
therefore quad v=sqrt{frac{T}{rho A}}=sqrt{frac{Y A alpha cdot Delta theta}{rho A}}=sqrt{frac{Y alpha Delta theta}{rho}}
]
Substituting the values we have,
[
v=sqrt{frac{1.3 times 10^{11} times 1.7 times 10^{-5} times 20}{9 times 10^{3}}}=70.1 mathrm{m} / mathrm{s}
]

# Tuyucu u Dusupuve Questions hod mo 1. A copper wire is held at the two ends by rigid supports. At 30°C, the wire is just taut, with negligible tension. Find the speed of transverse waves in this wire at 10°C. Given : Young modulus of copper = 1.3 x 10' N/m?. Coefficient of linear expansion of copper = 1.7 x 10-5°C-! Density of copper = 9x 10 kg/m. (1979, 4M) 2. A source of sound of frequency 256 Hz is moving rapidly

Solution