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2 litre water...

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2 litre water at 27 ^°C is heated by a 1kW heater in an open container . On an average heat is lost to surrounding at the rate 160 J/s. The time required for the temperature to reach 77 ^°C is

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Q. Two litre of water at initialled temperature of

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Q. Two litre of water at inital temperature of

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is heated by a heater of power

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