In: Physics
A copper block is removed from a 299
heat energy lost by one body = heat energy gain by other body
so
Q1=Q2
Q= mc(T2-T2)
now the mass ot the copper block m= (mc delta T)water/(c* delta T) coppet
= 0.8*4190*11.8/385*183.7
=5.49 Kg