Question

If p is density of water and B is Bulk modulus the
energy density of water in a lake h metre deep is

a)[(rho)gh]^2/2B

b)[(rho)gh]^2/B​

Answer 1

Answer:

Explanation:see the attach below it may help you

Answer 2

Answer is Option (B)

Explanation:

We know that,  

$\frac {M}{V}$ = r

where, r = mean density

V = Volume and M = Mass

$\Delta r = \frac {\Delta V}{V^2}M$

$\frac {\Delta r}{r} = \frac {\Delta VM}{V^2} \times \frac {V}{M}$

= $- \frac {\Delta V}{V}$

B = $- \frac {\Delta P}{\frac {\Delta V}{V}}$

where P = Pressure

B = Bulk Modulus

B = $\frac {hrg \times r}{\Delta r}$

$\Delta r = {hr^2g}{B}$

where h = depth