1. A crew wants to lift off an ocean floor a treasure chest using a balloon. The chest is 90 cm long, 40 cm wide, and 45 cm high. As the crew pumps air into the balloon, its spherical shape increases and when the radius is 190 cm, the chest just begins to rise toward the surface. How heavy is the chest?

2. It takes 22 hours to fill up a large cylindrical tank with water. The tank is 22 m high and 8 m in diameter. The water pours in the tank via a circular pipe that has diameter of 40 cm. Find: Volume Flow Rate. Calculate the speed of water in the pipe.

3. Water travels through a pipe at 0.5 m/s. The diameter of the pipe is 2 cm. Calculate the speed of the water leaving a shower head when it is attached to the pipe. The shower head has 100 small identical holes with 2 mm diameter each.