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a new design for a kettle is made from two layers of plastic separated by a vacuum after the water in the kettle has boiled the water stays hot for at least 2 hours. the energy transferred from the water in the kettle to the surroundings in 2 hours is 46 200 J. the mass of water in the kettle is 0.50 kg. the specific heat capacity of water is 4200J/kg 'C. the initial temperature of the water is 100'C. what is the temperature of the water in the kettle after 2 hours

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