9. A stirrer is fitted onto an insulated container. The container is filled with 15 pounds of water at 65 F. The stirrer turns by lowering a 15-pound mass outside of the container a distance of 25 feet using a frictionless pully system. Assume all work is done by the object and is transferred to the water and that the water is incompressible.

Determine the following:

a. The work transfer in BTU to the water

b. The increase in internal energy in BTU of the water

c. The final temperature of the water in F (assume the specific heat does not change)

d. The heat transfer in BTU from the water required to return the water to its initial temperature