A submarine is blocked at a depth of 150 m below sea level (average salinity 3%, therefore salt water density = 1030 kg / m3): a) calculate the pressure that the water exerts on the submarine b) calculate

A submarine is blocked at a depth of 150 m below sea level (average salinity 3%, therefore salt water density = 1030 kg / m3):

a) calculate the pressure that the water exerts on the submarine
b) calculate the force that the pistons must exert on a 80 cm diameter door in order to open it.

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