Biology, 18.02.2020 14:21 ashleyvalles16

When an electric kettle containing cold water is switched on, the water in it starts boiling after a few minutes. What is the source of the heat energy of the boiling water?

Mechanical energy from the power socket
Newly created energy that increased the total energy
Mechanical energy from the heating element in the kettle
Already existing energy that was present in some other form

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