Mathematical and Physical Journal
for High Schools
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Problem P. 3825. (October 2005)

P. 3825. By what amount does the area of a 20-Forint coin increase, if its diameter at 20 oC is 26.3 mm, and in our pocket its temperature increases to 35 oC. (The coefficient of linear expansion is \alpha=1.84.10-5 oC-1.)

(3 pont)

Deadline expired on November 11, 2005.


360 students sent a solution.
3 points:259 students.
2 points:55 students.
1 point:23 students.
0 point:2 students.
Unfair, not evaluated:21 solutionss.

Problems in Physics of KöMaL, October 2005