KöMaL - Mathematical and Physical Journal for Secondary Schools
Hungarian version Information Contest Journal Articles News
Entry form to the contest
Problems and solutions
Results of the competition
Problems of the previous years



Order KöMaL!

Competitions Portal

P. 4130. The horizontal cylinder shown in the figure and the piston in it, which can move without friction, are adiabatically insulated. The mass of the piston is 10 kg, the area of its cross-section is 50 cm2. The temperature of the air confined in the cylinder is 27 oC, its initial pressure is equal to the atmospheric pressure. The cylinder is slowly turned into the vertical position. By what value does its temperature change?

(5 points)

Deadline expired on 11 February 2009.

Statistics on problem P. 4130.
116 students sent a solution.
5 points:94 students.
4 points:6 students.
3 points:6 students.
2 points:5 students.
1 point:3 students.
Unfair, not evaluated:2 solutions.

  • Problems in Physics of KöMaL, January 2009

  • Our web pages are supported by:   Ericsson   Google   Cognex   Emberi ErĹ‘forrás TámogatáskezelĹ‘   Emberi ErĹ‘források MinisztĂ©riuma  
    OktatáskutatĂł Ă©s FejlesztĹ‘ IntĂ©zet   Nemzeti TehetsĂ©g Program     Nemzeti
Kulturális Alap   ELTE   Morgan Stanley