A solid rectangular block of height H=0.25 mH = 0.25\text{ m}H=0.25 m and uniform density ρb=720 kg m−3\rho_b = 720\text{ kg m}^{-3}ρb=720 kg m−3 floats vertically at the surface of a liquid of density ρf=1200 kg m−3\rho_f = 1200\text{ kg m}^{-3}ρf=1200 kg m−3, as shown in the diagram.
What is the difference in pressure between the bottom face and the top face of the block?
(Take g=9.81 m s−2g = 9.81\text{ m s}^{-2}g=9.81 m s−2)
1.06 kPa1.06\text{ kPa}1.06 kPa
1.47 kPa1.47\text{ kPa}1.47 kPa
1.77 kPa1.77\text{ kPa}1.77 kPa
2.94 kPa2.94\text{ kPa}2.94 kPa