1. An engine converts 95% of its energy to mechanical energy. What happens to the other 5% of its energy? ————————-——————
2. The diagram to the right shows a hydroelectric power
plant.

(a) Identify the type of energy of the water behind the dam.

(b) When the water flows past the turbine, as shown in the diagram, the energy of the water behind the dam changes to what type of energy?

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.

What can change the speed of sound as it travels through the ocean? a. salinity only b. density and salinity c. salinity and distance from land d. density and distance from land

5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much?