Physics

• what are the the 8 different energy stores?

  1. Thermal energy
  2. Kinetic
  3. Gravitational potential
  4. Elastic potential
  5. Chemical
  6. Magnetic
  7. Electrostatic
  8. Nuclear
• How is energy transferred between stores?

  Energy is transferred mechanically, electrically, by heating, or by radiation.
• What does "work done" mean in the context of energy transfer?

  Work done is another way of saying energy transferred; they are the same thing.
• What is the equation for kinetic energy ?


  0.5 x mass x velocity (2) squared
• What is the equation for gravitational potential energy?

  mass x gravitational field strength x height
• What is the gravitational field strength of earth ?

  9.8 n/kg
• What is the equation for elastic potential energy?

  0.5 x spring constant x extension (2) squared
• What is the equation that involves specific heat capacity?

  Change in thermal energy = mass x specific heat capacity x change in temperature
• What is power measured in ?

  Watts
• What is the equation that links power , energy transferred and time ?

  Power = Energy transferred / Time
• What is the equation that links power, work done and time ?

  power = work done/ time
• What is the definition for conduction?

  conduction is the process where vibrating particles transfer energy to neighbouring particle.
• What is the definition of convection?

  Convection is where energetic particles move away from hotter to cooler regions.
• What is the formula for specific latent heat?

  Energy= mass x specific latent heat
• What is the equation for density?

  Density = mass/volume
• What is the equation that links power, potential difference and current ?

  Power = Current x Potential Difference
• What is the equation that links energy transferred, power and time ?

  Energy transferred = Power x Time
• What is the equation that links potential difference, current and resistance?

  potential difference = current x resistance
• What is the equation that links charge, current and time ?

  Q = I x t (Charge = Current x Time)
• What is the equation for efficiency ?

  efficiency = useful power output / total power input