a) Find the gauge pressure and absolute pressure of a submarine at a depth of 50 meters,

b) If the submarine’s escape hatch is a rectangle 1 m by 2 m, find the minimum force need to open the door at this depth and feed the friendly

shark.

h = 50 meters

c) To allow people to live more comfortably within the submarine, it is kept at normal atmospheric pressure inside . This inside pressure

should make it easier to open the submarine’s escape hatch, which is 1 m by 2 m. Recalculate the force needed to open at 1 atmosphere of

internal pressure and a depth of 50 m.

h = 50 meters

d) The density of pure water is 1000 Kg/m3. Would the fact that the ocean is saltwater change our results?