Fill an electric kettle with an amount of cold water (say 500 cm 3 ). Switch the kettle on and measure the time it takes for the water to reach boiling point. Empty the kettle completely and repeat...

Fill an electric kettle with an amount of cold water (say 500 cm³
). Switch the kettle on and measure the time it takes for the water to reach boiling point. Empty the kettle completely and repeat the experiment twice. What values did you obtain for the boiling times? What factors do you think are responsible for the variation in times?