Hi! need help please thank you so much.

Question

Question:(a) Calculate the absolute pressure at the bottom of a freshwater lake at a depth of 28.7 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
___Pa

(b) What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 40.9 cm?
___ N

Answer 1

Pressure at bottom = pressure at surface + rho g h

= 1.013 *10^5 Pa + 10^3 * 9.81* 28.7

= 1.013 * 10^5 + 2.815 * 10^5

= 3.83 * 10^5 Pascals