Ch. 5 Energy

The kinetic energy of an object increases as it _______ increases.

• gravitational energy

• potential energy

• specific heat

• velocity

Increasing the speed of an object ________ its potential energy.

• does not affect

• increases

• decreases

• changes

The SI unit for energy is the ____ .

• calorie

• joule

• meter per second

• kilogram

You can calculate kinetic energy by using equation____.

• KE (J) = m (kg) x 9.8 m/s^2 x h(m)

• KE (J) = 2 (m) x h (m)

• KE (J) = 1/2 m (kg) x v^2 (m^2/s^2)

• KE (J) = 9.8 m/s^2 x 1.2 m (kg)

You can calculate gravitational potential energy by using the equation ____.

• GPE (J) = 1/2m (kg) x 1.2h (m)

• GPE (J) = m (kg) x 9.8 m/s^2 x h (m)

• GPE (J) = h (m) x 9.8 m/s^2

• GPE (J) = 1/2h (m) x w (m)

Which of the following devices does not make use of electrical energy?

• upright piano

• radio

• toster

• digital carmera

a bus engine transfers chemical potential energy into _____ so that the bus moves.

• thermal energy

• gravitational potential energy

• electrical energy

• kinetic energy

In nuclear fusion reaction, mass is transformed into ____.

• matter

• nuclei

• energy

• light

According to the law of conservation of energy, the total amount of energy in the universe ______________.

• remains constant

• changes constantly

• increases

• decreases

In the process called nuclear fission nuclei

• break apart

• fuse

• jump

• enlarge