Physics Equations

Question 1

Energy transferred (joules)

Answer 1

E = m x c x θ
Energy Transferred (J = mass (kg) x specific heat capacity (J/kg ºC) x change in temp. ºC

Question 2

Efficiency of a device

Answer 2

Useful energy out / Total energy in

Question 3

Energy transferred from mains (kWh)

Answer 3

E = P x t
Energy transferred (kWh) = power (kW) x time (hours)