1. The problem statement, all variables and given/known data Hello all. I am very new to learning about science and i've been given a question in my homework about power ratings and heat transfers. Basically the question is, on an electric kettle why is the power rating given as (e.g) 1500W - 2000W instead of just a single figure. 3. The attempt at a solution Is this because a fixed amount of water takes less power to heat up at lower temperatures and so the kettle works up to its maximum wattage as needed?