Question

A diver wants to raise a sunken treasure chest fro a depth of 35m below the surface of a lake. The ambient pressure is only 0.62atm. The density of freshwater is 1000kg/m^3.

a.) Calculate the absolute pressure at this depth in Pa, psi, and torr

b.) The diver measures the sixe of the chest to be 60cm x 40cm x 30cm and the average chest density is 10000kg/m^3. Calculate the weight of the chest underwater.

c.) The diver wants to use inflatable lift bags to raise the chest. The ultra-light bags are inflated through an opening at the bottom using the compressed air source. How many fully inflated bags are required if each bag has a max volume of 30liters.

d.) The diver inflates all the required bags until the chest (with bags) shoots to the surface. Calculate the partial volume of all the bags still submersed once the bags reach the surface and the chest becomes neutrally buoyant (assume that the chest remains fully submersed).

Answer 1