(A) A large balloon used to sample the upper atmosphere is filled with 565 m³ of helium. What is the mass of the helium (in kg)?

(B) Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 19.2 ft deep.

(C) An ebony log with volume 15.8 ft³ is submerged in water. What is the buoyant force on it (in lb)? (Enter the magnitude.)

(D) An empty storage tank has a volume of 1,210 ft³. What is the buoyant force exerted on it by the air? (Assume the air is at 0C and 1 atm.)

(E) A modern-day zeppelin holds 7,070 m³ of helium. Compute its maximum payload at sea level. (Assume the helium and air to be at 0C and 1 atm.)