A 1.30 kg ball is attached to a ceiling by a 1.93 m long string. The height of the room is
3.41 m.
The acceleration of gravity is 9.81 m/s^2.
What is the gravitational potential energy
associated with the ball relative to
a) the ceiling?
b.)the floor?
c.)a point at the same elevation as the ball?
(answer in J)

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.