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

 

 

Order KöMaL!

tehetseg.hu

Ericsson

Google

Emberi Erőforrások Minisztériuma

Emberi Erőforrás Támogatáskezelő

Oktatáskutató és Fejlesztő Intézet

ELTE

Competitions Portal

P. 3858. We would like to increase the length of a 160 cm long copper rod of cross section 4 mm2 by 1 mm. What is the energy absorbed by the rod if

a) the rod is stretched;

b) the rod is heated?

(4 points)

Deadline expired on 13 February 2006.


Statistics on problem P. 3858.
210 students sent a solution.
4 points:109 students.
3 points:23 students.
2 points:44 students.
1 point:12 students.
0 point:6 students.
Unfair, not evaluated:16 solutions.


  • Problems in Physics of KöMaL, January 2006

  • Our web pages are supported by: Ericsson   Google   SzerencsejátĂ©k Zrt.   Emberi ErĹ‘források MinisztĂ©riuma   Emberi ErĹ‘forrás TámogatáskezelĹ‘   OktatáskutatĂł Ă©s FejlesztĹ‘ IntĂ©zet   ELTE   Nemzeti TehetsĂ©g Program