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Energy revision notes Sun gives out vast quantities of energy in form of electromagnetic waves, much of it as light energy. Sound energy also travels as waves, carrying energy away from the vibrations of a noisy object. Nuclear power stations generate electricity from the nuclear energy possessed by atoms, by splitting large atoms into 2. The sun also releases nuclear energy by joining small atoms together. A cyclist has energy stored in his muscles. The chemicals in his muscles supply the energy and change when the muscles are used. This form of stored energy is called chemical energy. A motorbike uses energy stored in the petrol. The petrol has chemical energy because its chemicals change when it is burnt. A skier at the top of the hill has gravitational potential energy. This is energy that is there ready to be used because of the pull of gravity. Energy is also stored in stretched elastic...

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