Topic 1: Energy.

Question 1

Is energy used up?

Answer 1

Energy is never used up. It is instead transferred.

Question 2

What are the 8 Main energy stores?

Answer 2

Thermal, Kinetic, Gravitational Potential, Elastic Potential, Chemical, Magnetic, Electrostatic, Nuclear.

Question 3

What is the Power Definition?

Answer 3

Power is defined as the rate at which energy is transferred or the rate at which work is done.

Question 4

How does lubrication help reduce energy waste?

Answer 4

Oil in a motor: It reduces Friction, so less energy is lost as heat through friction.

Question 5

How does Thermal Insulation help reduce energy waste?

Answer 5

Double glazing, Less useful thermal energy is lost.

Question 6

What does efficiency mean?

Answer 6

Efficiency is the ratio of the useful work done by the energy supplied to it.

Question 7

How can the efficiency of a system be increased?

Answer 7

Reducing waste output, Recycling waste input.

Question 8

What are the Non-Renewable energy resources?

Answer 8

Fossil Fuels, ( Coal Oil Gas ).
-Nuclear Fuel.

Question 9

What are the Renewable Energy Resources?

Answer 9

Biofuel, Wind, Hydroelectricity, Geothermal, Tidal, Solar, Water Waves.

Question 10

What is the definition of specific latent heat?

Answer 10

The amount of energy needed to raise the temp if 1kg of a substance by 1oC.

Question 11

Give an example of energy transferred by heating.

Answer 11

Energy transferred to water by a kettles heating system. Energy goes to the waters thermal store.