Energy Stores

• Energy


  Never used up, just transferred between different energy stores and different objects
• Energy Transfer


  1. Energy is transferred to an object

  2. Energy is stored in one of the object's energy stores
• Energy stores (Cats Take Every Meal Gratefully, Everyone Knows Now)


  • Thermal energy stores
  • Kinetic energy stores
  • Gravitational potential energy stores
  • Elastic potential energy stores
  • Chemical energy stores
  • Magnetic energy stores
  • Electrostatic energy stores
  • Nuclear energy stores
• Thermal energy stores


  Also called internal energy stores
• System


  • A single object or a group of objects that you're interested in
• When a system changes


  1. Energy is transferred into or away from the system

  2. Between different objects in the system

  3. Between different types of energy stores
• Closed system


  A system where neither matter nor energy can enter or leave
• The net change in the total energy of a closed system is always zero
• Energy transfer by heating


  1. Energy is transferred to the water's thermal energy store (causing the temperature of the water to rise)

  2. Energy is transferred electrically to the thermal energy store of the kettle's heating element, which transfers energy by heating to the water's thermal energy store