Chapter 5, Problem 5.73PP

An undersea camera (Figure 5.36 ) is to hang from a float in the ocean, allowing it to take constant video of undersea life. The camera is relatively heavy; it weighs $40$ pounds and has a volume of only $0.3f{t}^3$. It is to hang $2$ ft below the float on a pair of wires, allowing it take video at this constant depth. The float will be cylindrical, have a specific gravity, sg = $0.15$, have a thickness of $6$ in. What is the minimum diameter of the float? Note that for the minimum float, the waterline will be coincident with the top of the float. If the float is made of a larger diameter, what will happen? If the float is made of a smaller diameter, what would happen?

Figure 5.36