Energy and Efficiency

Energy and Efficiency

1. Forms of energy

   • Magnetic
     • Energy in magnets and electromagnets
   • Kinetic
     • The energy in moving objects
   • Heat
     • A.K.A Thermal energy
   • Light
     • A.K.A Radiant energy
   • Gravitational Potential
     • Stored energy in raised objects
   • Chemical
     • Stored energy in fuel food and batteries
   • Sound
     • Energy released by vibrating objects
   • Electrical
     • Energy in moving charges or static electric charges
   • Elastic Potential
     • Stored energy in squashed or stretched objects
   • Nuclear
     • Stored in the nuclei of atoms
   • Most Kids Hate Learning GCSE Energy Names

2. Energy transfer

   • Energy can be transferred usefully, stored, or dissipated , but cannot be created or destroyed
   • When energy is transferred, only part of it may be usefully transferred; all other energy output is "wasted"
     • Wasted energy is eventually transferred to the surroundings , which become warmer. The wasted energy energy becomes increasingly spread out and so becomes less useful

3. Calculating Efficiency

   • Efficiency= useful energy out/ total energy in (*100%)
   • Efficiency= useful power out/ total power in (*100%)