Energy

• Specific heat capacity is the amount of energy needed to raise the temperature of 1kg of a substance by 1 degree C.
• energy (J) = mass (kg) x specific heat capacity (J/kg°C) × chance in temperature (°C)
• Energy can be transferred usefully, stored or dissipated. But it can never be created or destroyed.
• power (W) = energy transferred (J) / time (s)
• power (W) = Work done (J) / time (s)
• efficiency = useful output / total input