Using energy 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: Sam EvansCreated on: 23-05-14 19:49 What form of energy does a moving car have? Kinetic energy 1 of 9 What form of energy does a stretched spring have? Elastic potential energy 2 of 9 When is electrical energy transferred? When an electric current flows 3 of 9 What are the useful energy transfers that take place in a hairdryer? Electrical energy to kinetic energy and energy transferred by heating 4 of 9 What are the useful energy transfers that take place in a television? Electrical energy to light and sound 5 of 9 What energy transfers take place when you lift a ball into the air and then drop it so it falls to the ground? Kinetic energy to gravitational potential energy to kinetic energy 6 of 9 Wear and tear causes a particular machine to waste more energy. What happens to the efficiency of this machine? Its efficiency decreases 7 of 9 Why is an electric heater the only appliance that may have an efficiency of 1, or 100%? Because it it designed to transfer energy by heating, which is normally how appliances waste energy 8 of 9 Why do electrical appliances such as televisions and computers have vents? So wasted energy can be transferred easily to the surroundings making them warmer 9 of 9
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