A piece of copper in 400 gram is heated to hundred degree celsius and then quickly transferred to a copper calorimeter of mass 10 g containing 100 g of liquid of unknown specific heat capacity at 30 degree celsius if the final temperature of the mixture is 50 degree celsius

Question

A piece of copper in 400 gram is heated to hundred degree celsius and then quickly transferred to a copper calorimeter of mass 10 g containing 100 g of liquid of unknown specific heat capacity at 30 degree celsius if the final temperature of the mixture is 50 degree celsius
calculate
 the specific heat capacity of the liquid given that the specific heat capacity of copper is 390 joules per kg per Kelvin