2 litre water at 27 C is heated by a 1 kW heater in an...

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2 litre water at 27 C is heated by a 1 kW heater in an open container On an average heat is lost to surroundings at the rate 160 J s The time required for the temperature to reach 77 C is 1 8 min 20 sec 2 10 min 3 7 min 4 14 min

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