A submarine floats in seawater with two-thirds of its volume below the surface. The submarine can float because even though it is made of metal, most of its volume is filled with air.
What is the average density of the submarine? Explain/show how you get your answer.
b. The submarine now takes on water to increase its average density, and as a result, it descends to a depth of 40.0 meters. What will a pressure sensor on the outside of the submarine read at this depth?
c. If the crew needs to escape from the submarine through a pop-out hatch with dimensions of 0.75 m by 0.75 m, what force would they need to apply to the hatch to open it?