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3. A 3 kW electric kettle is filled with 1.6 kg of water at 20?C. a) Calculate the least possible time for the water to be brought to the boil. b) If the kettle requires 0.5 kg of water to cover the heating element, calculate the minimum time it would then take to boil away enough water at 100?C to expose the element to air.


3. A 3 kW electric kettle is filled with 1.6 kg of water at 20?C. a) Calculate the least possible time for the water to be brought to the boil. b) If the kettle requires 0.5 kg of water to cover the heating element, calculate the minimum time it would then take to boil away enough water at 100?C to expose the element to air.


Grade:10

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