A piece of copper of ball of mass 20g is placed in a copper calorimeter of mass 60g containing 50g of water at 30 degree Celsius ignoring heat losses, calculate the final steady temperature of the mixture. (SHC of water = 4.2j/g/k)

Answer 1

Not enough info. Need temp of copper and calorimeter.
PS. A copper calorimeter is about the dumbest thing I've ever heard of. The idea is to use an insulator and copper is about as non-insulating as it gets.

Answer 2

35.6