Energy Multiple Choice Questions Set 4

What name is given to the energy stored in bonds between molecules?

• chemical potential energy

• elastic potential energy

• gravitational potential energy

• thermal energy

What is the equation used to calculate gravitational potential energy?

• gravitational potential energy = mass × gravitational field strength

• gravitational potential energy = mass × (height)²

• gravitational potential energy = mass/height

• gravitational potential energy = mass × gravitational field strength × height

What is specific heat capacity?

• the temperature change when 100J of energy is transferred to 1kg of a substance

• the amount of energy required to change the state of 1kg of a substance with no change in temperature

• the mass of a substance that can store 1kJ of energy with no change in temperature

• the amount of energy required to raise the temperature of 1kg of a substance by 1°C

An elastic band with a spring constant of 40N/m is extended by 15cm. How much elastic potential energy is stored in the elastic band? Use the equation Ee = 1/2 k e².

• 0.45J

• 4.5J

• 45J

• 450J

A drill transfers 450 000J of energy in 1 minute. What is the power of the drill?

• 7500W

• 450 000W

• 4.5kW

• 270kW

Which of the following energy resources is ‘carbon neutral’?

• bio-fuel

• coal

• gas

• oil

Why are some people opposed to the use of wind as an energy resource?

• wind turbines take up large areas of land that could be used for farming

• wind turbines are very reliable

• wind is renewable

• wind is a store of kinetic energy

Which pathway describes the change in the way energy is stored when a vehicle slows down?

• elastic potential energy → internal energy

• chemical potential energy → kinetic energy

• kinetic energy → thermal energy

• gravitational potential energy → kinetic energy

The energy supplied to a microwave is 2000J. The microwave is 67% efficient. How much energy is usefully transferred by the microwave?

• 67J

• 1340J

• 660J

• 2000J

A car travelling at 20m/s has a kinetic energy store of 300 000J. What is the mass of the car?

• 750kg

• 1200kg

• 1500kg

• 3000kg