A Piece Of Copper Is Heated To 90 C And Then Lowered Into A Beaker Of Water Whic

A piece of copper is heated to 90°c and then lowered into a beaker of water which is at 20°c. The copper transfers 3040 J of energy to the water before it is removed. The temperature of the copper after it is removed is 50°c. The specific heat capacity of copper is 380 J/kg°C. 

Calculate the mass of the the copper.

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