Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem P. 4362. (September 2011)

P. 4362. 10 cm from a tap the diameter of the narrow water stream, flowing from the tap, is 2 mm. How long does it take to fill a half-litre mug?

(4 pont)

Deadline expired on October 10, 2011.

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

Megoldás. A vízsebesség $\displaystyle \sqrt{2gh}=$1,4 m/s, a vízhozam $\displaystyle v\cdot r^2\pi=4{,}4\cdot 10^{-6}~{\rm m^3/s},$ a töltési idő 1,9 perc.

### Statistics:

 160 students sent a solution. 4 points: 97 students. 3 points: 19 students. 2 points: 10 students. 1 point: 15 students. 0 point: 14 students. Unfair, not evaluated: 5 solutionss.

Problems in Physics of KöMaL, September 2011