A piece of metal with a mass of 1.2 kg, specific
heat of 176 J/kg/
◦C, and initial temperature
of 98◦C is dropped into an insulated jar that
contains liquid with a mass of 3 kg, specific
heat of 1000 J/kg/
◦C, and initial temperature
of 1◦C. The piece of metal is removed after
6.2 s, at which time its temperature is 20◦C.
Find the temperature of the liquid after the
metal is removed. Neglect any effects of heat
transfer to the air or to the insulated jar.
Answer in units of ◦C