Mathematical and Physical Journal
for High Schools
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Problem M. 294. (February 2009)

M. 294. Measure the ratio at which the different washing-up liquids decrease the surface tension of water.

Does this ratio depend on the concentration of the liquid?

(6 pont)

Deadline expired on March 11, 2009.


12 students sent a solution.
6 points:Balogh Máté, Farkas Márton, Gulyás Máté, Karsa Anita, Maknics András, Szabó 895 Dávid.
5 points:Farsang István.
4 points:4 students.
3 points:1 student.

Problems in Physics of KöMaL, February 2009