An electric hotplate is used to boil water in a saucepan. A student measures the mass of water that turned into steam in a time of 8.0 minutes8.0\text{ minutes}8.0 minutes.
Explain how the student could use this information, along with the standard value for the specific latent heat of vaporisation of water, to estimate the useful power output of the hotplate in watts.
37 exam-style questions on AQA GCSE Physics 3.2 Internal energy and energy transfers, covering 3.2.1 Internal energy, 3.2.2 Temperature changes in a system and specific heat capacity, and 3.2.3 Changes of state and specific latent heat. Each one has a worked solution and a mark scheme showing where the marks go.