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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

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