physics recap

• conservation of energy

  • can't be created / destroyed
• equation for elastic potential energy

  e= 1/2 x k x e

  Epe= 1/2 x spring constant x extension
• specfici heat capacity

  • how much energy is required increase the temperature of a substance by 1 degree
• specific heat capacity pratical

  • measure a beaker,add water,measure with water to find the mass of the water.connected ampmeter in series and voltmeter in parallel
  • use an electric heater to heat water (polysterin cup)
  • use a stir to evenly disturbute the water
  • work out final tempetrue
  • use power = current x potential difference
  • energy = power x time
• what is power

  the rate of energy transfeer

  power = energy/time
• work done= energy transferred by a force

  energy = distance x force