On August 12, 2000, the Russian submarine Kursk sank to the bottom of the sea, 3

Question

On August 12, 2000, the Russian submarine Kursk sank to the bottom of the sea, 350 feet below the surface. The density of water is 62.4 lb/ft^3. (a) Find the water pressure in pounds per square foot at the depth of the Kursk surface. Ib/ft^2 (b) Find the force on a 4 foot square metal sheet held horizontally at the depth of the Kursk lb Find the force on a 4 foot square metal sheet held vertically at the depth of the Kursk. (The bottom of the sheet is at a depth of 350 feet.) lb. The ocean liner Titanic lies under 12, 500 feet of water at the bottom of the Atlantic Ocean. (a) What is the water pressure at the depth of the Titanic? Assume the density of water is 62.4 Ibs per cubic foot. lb/ft^2. The total force on a circular window of diameter 2 feet standing vertically with its center at the depth of the titanic.

Explanation / Answer

From the given question,

depth(h)=350 ft

density(d)= 62.4 lb/ft3

pressure=350*62.4

=21840 lb/ft2

b) force on 4 foot square metal= pressure x area

=21840 x 4 x 4 lb

=349440 lb

c)when held vertically, center of gravity is at center.

depth from surface= 350-2=348 ft

pressure at depth of 348 ft=348*62.4

=21715.2 lb/ft2

Force= pressure * area

=21715.2*4*4

=347443.2 lb

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