An electric hot water dispenser is used to heat water.
The amount of energy, EEE, needed to heat the water is 504 000 J504\,000\text{ J}504000 J.
The dispenser has a power of 2800 W.
Calculate the time, ttt, it takes to heat the water.
Use the equation:
P=Et P = \frac{E}{t} P=tE26 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.