When a theory is disproved by further evidence, which of the following occurs? O lt should be considereda failure.
O It adds to scientific knowledge.
O It becomes a law.
O New data must be found to support it.

Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.