Mathematical and Physical Journal
for High Schools
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Problem M. 320. (January 2012)

M. 320. Drill (or in any other way make) a small hole to the bottom of a 1.5 litre plastic bottle, and fill the bottle with water to a height of H. Measure how the time T during which the water flows out of the water depends on the diameter of the hole and on the height of the water H. According to theoretical reasons T is proportional to some power of H. According to the measured data what is this exponent?

(6 pont)

Deadline expired on February 10, 2012.


18 students sent a solution.
6 points:Juhász Péter, Kollarics Sándor, Kovács 444 Áron, Szabó 928 Attila.
5 points:Papp Roland, Szigeti Bertalan György.
4 points:4 students.
3 points:4 students.
2 points:2 students.
1 point:2 students.

Problems in Physics of KöMaL, January 2012