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A metal ball of mass 2kg and a temperature of 290 degree Celsius is dropped...

A metal ball of mass 2kg and a temperature of 290 degree Celsius is dropped into a certain quantity of water at 30 degree Celsius. if the temperature of the mixture is 80 degree Celsius and the specific heat capacity of metal and water are 450 and 4200 joule/kg/k respectively. calculate the mass of the water.?
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