Mathematical and Physical Journal
for High Schools
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Problem P. 4553. (September 2013)

P. 4553. The operation of a hot air balloon is to be modelled by a small candle and a light plastic bag. Estimate the minimum volume of the ascending bag which is in a room of temperature 20 oC, if the average temperature of the air in the bag is 80 oC, and the total mass of the candle, the bag and the other equipments is 12 grams.

(4 pont)

Deadline expired on October 10, 2013.

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

Megoldásvázlat. Kb. 60 liter.


110 students sent a solution.
4 points:84 students.
3 points:16 students.
2 points:5 students.
1 point:3 students.
0 point:2 students.

Problems in Physics of KöMaL, September 2013