Energy

Energy

Energy storage
1. Thermal/ internal energy
2. Kinetic
  1. KE = 1/2mv^2
3. Gravitational potential
  1. GPE = M*GFS*H
4. Elastic potential
  1. Ep = 1/2*spring constant(K)*extention(E)^2
5. Chemical
6. Magnetic
7. Electrostatic
8. Nuclear
Transferring energy
1. Energy can not bee created nor destroyed, only transferred
2. Energy is transferred by doing work
  1. Work done = Force * distance
3. Power is the work done over time
  1. P= E/T
  2. P= W.D /T
  3. Measured in watts
4. Transferring heat
  1. Conduction
  2. Convection and convection currents
  3. Radiation
5. Reducing energy transfers
  1. Lubricant to reduce friction
  2. Insulators
Specific heat capacity
1. The energy you need to heat 1kg of a substance by 1 degree C
2. Change in energy (Delta E) = M*specific heat capacity (C)* Change in energy (delta theta)
3. Finding specific heat capacity
  1. Get 1kg of a material with two holes in the top
    1. Wrap it in insulation
      1. Measure initial temperature and set the powerpack to 10V
        Measure temperature every minute
        Plot results on a graph the energy transferred for each degree C
        Use E =PT to find energy as power = 10
        1/(gradient*mass) = specific heat capacity
Efficiency = useful energy out / energy in
Energy resources
1. Non-renewable
  1. Biofules
    1. Made from plant waste
    2. incredibly polluting
    3. coal
    4. oil
    5. gas
  2. Nuclear
2. Renewable
  1. Wind
  2. Solar
  3. Geothermal
  4. Hydro-electric power
  5. Wave
  6. Tidal

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