Mathematical and Physical Journal
for High Schools
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Problem P. 3919. (October 2006)

P. 3919. There is a vertical cylinder filled with a sample of ideal gas in a thermostat. A horizontal piston which can move easily, splits the cylinder into two parts. The volume of the upper part is 4 times as much as the volume of the part below. If the cylinder is placed to a thermostat at a temperature of 400 K the ratio of the volumes of the upper and lower parts will be 3:1. Find the ratio of the number of molecules of the gas in the two parts of the cylinder.

(4 pont)

Deadline expired on November 13, 2006.


111 students sent a solution.
4 points:67 students.
3 points:16 students.
2 points:4 students.
1 point:4 students.
0 point:10 students.
Unfair, not evaluated:10 solutions.

Problems in Physics of KöMaL, October 2006