Question

The top of a submersible diving vehicle is 3.15 m deep in the ocean (the specific gravity of seawater is 1.03) when it experiences a short circuit, which cuts off all power. To escape before it sinks, the crew must open a circular hatch (radius 0.49 m) in the top. If the pressure inside the submersible is 1 atm: find F, the magnitude of the force the crew must exert on the hatch to open it, in N.

Answer 1

specific gravity of sea water =SG =1.03 SG = Poznate = 1.03 р density of pure water = p=1000 kg m => Pesawaer =1030 kg m if the pressure inside the submarine =1.0 atm let P be the water pressure at the depth = h = 3.15m, P=pgh weplug the know values in the relation gives P=30870 Pa the magnitude of force the crew must exerton the hatch to open = Fmax F a = PA ; area of cross section of circular hatch = Tr? = 0.7543m? = 23290N