1. In studying the behavior of bouncing balls, a couple of Science 10 students recorded the following energy values.
Bouncing Balls
Type of Ball
Starting Potential Energy (J) Ending Potential Energy (IT)
golf ball
0.44
0.38
tennis ball
0.56
0.30
Use these energy values to compare the percent efficiencies of the balls during the bounce.
Show your work.
2. In heating a kettle of water on an electric stove, J of thermal energy was provided by the
element of the stove. Yet, the water in the kettle gained only J of thermal energy.
Determine the percent efficiency of the electric element in heating the kettle of water.
Show your work.