1. Jan 1, 2008

### always_smile

A piece of metal with a mass of 1.50 kilograms, specific heat of 200 J/kg · C°, and initial temperature of 100° C is dropped into an insulated jar that contains liquid with a mass of 3.00 kilograms, specific heat of l,000 J/kg · C°, and initial temperature of 0° C. The piece of metal is removed after 5 seconds, at which time its temperature is 20° C. Neglect any effects of heat transfer to the air or to the insulated jar.

What is the temperature of the liquid after the metal is removed ?
a.) 0° C
b.) 4° C
c.) 8° C
d.) 10° C
e.) 20° C

What is the average rate at which heat is transferred while the piece of metal is in the liquid ?
a.) 4,000 J/s
b.) 4,800 J/s
c.) 6,000 J/s
d.) 9,600 J/s
e.) 16,000 J/s

i have no idea what i should do
thanks

2. Jan 1, 2008

### G01

Read the forum rules please. We cannot help you unless you show some proof that you have put effort into this problem, i.e. work. You do not necessarily need to have equations and numbers, but you must show that you have put some time into the problem posted.