Physics, 20.06.2020 17:57 sweetcandy16gaming

A 2 kW kettle contains 2 kg of water at 10°C. It is switched on for 420 seconds, and the
temperature rises to 100°C.
a) How much electrical energy is supplied?
b) How much energy was given to the water?
c) Why are these 2 answers not the same?
d) What percentage of the energy supplied wen
to the water?
e) How could this percentage (the efficiency)
be increased?

Answers: 1

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A 2 kW kettle contains 2 kg of water at 10°C. It is switched on for 420 seconds, and the
tempe...