Physics
posted by Kelsey .
A 3 Kg lead ball is dropped into a 3 L insulated pail of water initially at 20.0 degrees C. If the final temperature of the waterlead combination is 25 degress C, what was the initial temperature of the lead ball?

the sum of the heats gained is zero.
heat gained by water+heat gained by Pb =0
3000*Cw(Tf20)+3*Cpb*(TfTi)=0
solve for Ti lead. 
69 degrees