AQA Physics 2020 P1 Q7 - An electric Kettle is switched on - Specific Heat Capacity and Power

Here's a walk through of AQA 2020 P1 question 7. We discuss energy changes as you heat up some water in a kettle - very exciting indeed, but this question has difficult last part which involves proving that the gradient of temperature/time graph can give the power of kettle. Awesome

We also have to find the mass of water in that kettle given the energy supplied.

With worked answers and and clear explanations brush up on your understanding of energy changes, specific heat capacity and even gradients of graphs.