Mathematical and Physical Journal
for High Schools
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Problem P. 3907. (September 2006)

P. 3907. Estimate how much more it costs to cover the distance by car between Miskolc and Sárospatak if the lights are on than if they are turned off. The total power dissipated in the lights is 50 W, the average speed is 60 km/h and the efficiency of the engine is 25%.

(4 pont)

Deadline expired on October 11, 2006.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. Kb. 6 forinttal.


192 students sent a solution.
4 points:127 students.
3 points:26 students.
2 points:18 students.
1 point:10 students.
0 point:7 students.
Unfair, not evaluated:4 solutions.

Problems in Physics of KöMaL, September 2006