Ysy

• Energy


  Can not be created or destroyed, it can only be transferred from one store to another
• Different energy stores


  • Chemical
  • Kinetic
  • Thermal
  • Light
  • Elastic potential
  • Gravitational potential
  • Electrical
  • Magnetic
  • Nuclear
  • Sound
• Energy transfer in a car

  1. Chemical energy (from petrol)

  2. Kinetic energy. (Wasteful

  3. Thermal energy (waste)

  4. Sound energy (waste)
• Energy transfer in a kettle


  1. Electrical energy (useful)

  2. Thermal energy (useful) light energy

  3. Sound energy (waste)
• Solids


  • Closely packed together, can only vibrate in a fixed position
• Conduction


  Happens in solids, transfers thermal energy
• Liquids


  • Particles are still touching, can move over each other
• Convection


  Transfers thermal energy in liquids
• Gases


  • Particles move freely, in random speeds and directions
• Convection


  Transfers thermal energy in gases
• Thermometer


  • Liebig condenser
  • Bunsen burner
• Water boils at 100°C
• Pressure


  Force / Area
• Large surface area


  Results in smaller pressure
• Small surface area


  Results in larger pressure
• Pressure X area = force
• Force/ pressure= area