This video explains about Work, Power and Energy
Power
Power = how quickly the energy is transferred (from electrical to heat energy)
Which boils quicker? Kettle with high power rating or Kettle with low power rating?
- High power = Kettle heats up quickly
- Low power = Kettle heats up slowly
Calculating Power
Power = how much energy is given to an appliance per unit of time
Power (Watts) = voltage x current
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Energy Types
- Magnetic Energy found in magnets and electromagnets
- Kinetic Energy - The energy in moving objects. Also called movement energy.
- Heat - Also called thermal energy
- Light - Also called radiant energy
- Gravitational Energy - Stored energy in raised objects.
- Chemical Energy - Stored energy in fuel, foods and batteries.
- Sound Energy - released by vibrating objects.
- Electrical Energy - found in moving or static electric charges.
- Elastic Energy - Stored energy in stretched or squashed objects.
- Nuclear Energy - Stored in the nuclei of atoms.
