Conservation of energy

Which of these is not a type of energy?

• Light

• Sound

• Kinetic

• Transverse

What type of energy is stored in a hair dryer?

• Electrical

• Heat, sound and kinetic

• Light, heat and sound

• Electrical, heat, sound, and kinetic

As an object is falling it gains less

• Kinetic energy

• GPE

• Electrical energy

• Chemical energy

Energy is not made or destroyed, only stored or transferred. This is the law of...

• Conservation of mass

• Conservatism of energy

• Conservation of energy

• Communism

What is efficiency?

• How much energy is wasted

• How good it is at transferring energy to useful forms

• How much energy is used

• How fast a machine is at transferring energy

What does dissipate mean?

• To give out to the surroundings

• Take in from the surroundings

• Absorb from surroundings

• Measures distance

In which form is kinetic energy stored in the brakes of a car?

• Sound from the brakes

• Light

• Thermal from the friction

• GPE

Tags

NGSS.MS-PS3-5

An efficient machine will have a rating close to

• 0

• 5

• 10

• 1

The equation for efficiency is...

• Useful energy out x total energy in

• Useful energy in/ total energy in

• Useful energy out/ total energy out

• Useful energy out/ total energy in

Calculate the efficiency of a light bulb being supplied with 100J of energy and 20J converted to light

• 2

• 8

• 20

• 80