page 34 physics efficiency of machines 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: Waldron16Created on: 17-11-13 19:13 Give the energy transfers of the device batteries. chemical energy- electrical and heat energy 1 of 5 Give the energy transfers of firing a bow and arrow. Elastic potential energy-kinetic and heat energy 2 of 5 What is the most wasted energy in a device heat 3 of 5 What units should efficiency be given in. percentage or decimal 4 of 5 What makes a device efficient? The less energy that is "wasted", the more efficient the device is said to be. 5 of 5
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