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A blacksmith dropped a 2.5kg iron bead at 300degree into some quantity of water.if the...

A blacksmith dropped a 2.5kg iron bead at 300degree into some quantity of water.if the temperature of the water rose from 15 to 18,wot is the mass of the water assuming no heat is lost to the surrounding? Take specific heat of iron as 0.46*10'3 and that of water 4.3*10'3?
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