Question

Find the density of water 2 km deep in a sea. Bulk modulus = 2 × 10⁹Pa.

• A. 10³ kgm^-3
• B. 1010 kgm^-3
• C. 1100 kgm^-3
• D. 1040 kgm^-3

Answer 1

Answer: (B)

1010 kgm^-3

Answer 2

$\frac{\Delta V}{V} = \frac{P}{B} = \frac{2 \times 10^{3} \times 10^{3} \times 10}{2 \times 10^{9}} = 0.1$

$\frac{\Delta V}{V} = \frac{\Delta\delta}{\delta}or\Delta\delta = 10kg/m^{3}.$

density of water = 1010 kg m^-3.