Mathematical and Physical Journal
for High Schools
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# Problem P. 4824. (March 2016)

P. 4824. The water of a lake in winter becomes colder and colder. Finally it freezes, and the width of the ice is getting thicker. Supposing that the air temperature is $\displaystyle -20~{}^\circ$C, sketch the graph of the temperature at a certain moment as the function of the depth measured from the top of the ice cover down to the bottom of the lake.

(4 pont)

Deadline expired on April 11, 2016.

### Statistics:

 24 students sent a solution. 4 points: Bánki Bence, Csenger Géza, Csuha Boglárka, Fehér 169 Szilveszter, Horváth 914 Bálint, Krasznai Anna, Kuchár Zsolt, Makovsky Mihály, Nagy Nándor, Németh Flóra Boróka, Nyerges Dóra, Pszota Máté, Radnai Bálint, Tanner Martin, Weisz Pál, Wesniczky Albert. 3 points: Kopitkó Tünde, Köpenczei Csenge, Pintér 345 Balázs, Sallai Krisztina, Simon Dániel Gábor. 2 points: 2 students. 1 point: 1 student.

Problems in Physics of KöMaL, March 2016