The principle of conservation of energy states that energy:

Cannot be created or destroyed, only transferred

Efficiency is calculated as:

Useful output divided by total input

16questions. Pick an answer and you'll see why right away.

Which of these is an energy store?
The principle of conservation of energy states that energy:
When energy is dissipated, it is usually transferred to the surroundings as:
The equation for work done is:
A force of 50 N moves a box 6.0 m. How much work is done?
Why is no work done when you hold a heavy bag still?
The kinetic energy of a moving object is given by:
What is the kinetic energy of a 4.0 kg object moving at 5.0 m/s?
Gravitational potential energy gained when a mass is raised is given by:
For a freely falling object (no air resistance), the gravitational potential energy lost equals the:
Power is the rate of:
A device transfers 2400 J in 8.0 s. What is its power?
Efficiency is calculated as:
A motor takes in 500 W and usefully outputs 400 W. What is its efficiency?
Which of these is a non-renewable energy resource?
Which statement about nuclear power is correct?