Mathematical and Physical Journal
for High Schools
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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.


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 solutions.

Problems in Physics of KöMaL, March 2005