physics-density

• Density is defined as mass divided by volume.
• The amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

  Specific heat capacity
• Energy change when change of temp.

  = mass × specific heat capacity × temperature change
• The amount of energy required to change the state from solid to liquid of one kilogram of the substance with no change in temperature. 


  Latent heat of fusion
• The amount of energy required to change the state from liquid to gas of one kilogram of the substance with no change in temperature. 


  Latent heat of vaporisation
• Energy change when change of state

  = mass × specific latent heat
• density

  = mass / volume
• The total kinetic energy and potential energy of all the particles that make up a system


  Internal energy
• efficiency

  = [useful energy out] x 100

  Total energy in
• power


  = energy / time