Problem P. 3783. (March 2005)

P. 3783. We throw a solid iron ball of a mass of 0.2 kg previously heated in blue flame, into 0.15 l water of a temperature of 13 ^oC contained in a copper calorimeter. The common temperature settles at 55 ^oC. What color was the iron ball before it was thrown into the water.

(4 pont)

Deadline expired on April 11, 2005.

Statistics:

193 students sent a solution.
4 points:	77 students.
3 points:	83 students.
2 points:	24 students.
1 point:	6 students.
Unfair, not evaluated:	3 solutionss.

Problems in Physics of KöMaL, March 2005