Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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Problem M. 372. (November 2017)

M. 372. Make a sandglass from a cylinder-shaped plastic (PET) water bottle. Make a small hole (of diameter approximately 8-10 mm) on the bottle cap through which the dry sand can flow out. Measure how the amount of the out-flowing sand in a unit of time depends on the height of the sand in the bottle.

(6 pont)

Deadline expired on December 11, 2017.


13 students sent a solution.
6 points:Fajszi Bulcsú, Horváth 008 László, Merkl Gergely, Morvai Orsolya, Olosz Adél, Osváth Klára.
4 points:2 students.
3 points:1 student.
2 points:2 students.
1 point:1 student.
0 point:1 student.

Problems in Physics of KöMaL, November 2017