Question

A ball falling in a lake of depth `200 m` shows a decrease of `0.1% ` in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take `g = 10 ms^(-12)`)
A. `10^(9)N//m^(2)`
B. `2xx10^(9)N//m^(2)`
C. `3xx10^(9)N//m^(2)`
D. `4xx10^(9)N//m^(2)`

Answer 1

Correct Answer - B
`/_P=hrhog=200xx10^(3)xx10N//m^(2)=2xx10^(-6)N//m^(2)`
`K=(/_P)/((/_V)/V)= (2xx10^(6))/(0.1/100)=(2xx10^(8))/0.1N//m^(2)=2xx10^(9)N//m^(2)`