1. A storage tank29m high is filled withpure water. (Assume the tank is open and exposed to the atmosphere at the top.)

a. Find the gauge pressure at the bottom of the tank.

b. Calculate the magnitude of the force produced by the fluid that acts on a square access hatch at the bottom of the tank that measures0.4mby0.4m.

2. A modern-day zeppelin holds8,900m³of helium. Compute its maximum payload at sea level. (Assume the helium and air to be at 0C and1 atm.)