Question : In a water-lifting electric pump, we convert

Option 1: electrical energy into potential energy

Option 2: kinetic energy into electrical energy

Option 3: kinetic energy into potential energy

Option 4: electrical energy into kinetic energy

Question : A wound watch spring has ____ energy.

Option 1: electrical

Option 2: kinetic

Option 3: potential

Option 4: both kinetic and potential

Question : If the momentum of a body is doubled, the kinetic energy is:

Option 1: becomes 1/4 times

Option 2: unchanged

Option 3: doubled

Option 4: becomes 4 times

Question : The motion of a body around a circular path is an example of

Option 1: Uniform velocity, variable acceleration

Option 2: Uniform speed, uniform velocity

Option 3: Uniform speed, variable velocity

Option 4: Uniform speed, variable acceleration

Question : The enormous amount of energy released in the explosion of an atomic bomb is due to the

Option 1: Conversion of mass into energy

Option 2: Conversion of chemical energy into heat energy

Option 3: Conversion of mechanical energy into nuclear energy

Option 4: Conversion of neutrons into protons