Mathematical and Physical Journal
for High Schools
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Problem M. 281. (October 2007)

M. 281. According to a housewife if water at a temperature of 100 oC, is poured from the kettle to the cup from a height of 15-20 cm, than the water in the cup will be colder than if the water is poured at the height of the rim of the cup.

Check with measurement whether she is right or wrong.

(6 pont)

Deadline expired on November 12, 2007.


39 students sent a solution.
6 points:Balogh Máté, Karsa Anita, Vida György.
5 points:Bedics Gábor, Borák Balázs Sándor, Fialowski Melinda, Greksza Máté Attila, Kiss Boldizsár, Lovász Krisztina, Papp Ádám, Rárósi Dávid.
4 points:6 students.
3 points:8 students.
2 points:3 students.
1 point:1 student.
0 point:9 students.
Unfair, not evaluated:1 solution.

Problems in Physics of KöMaL, October 2007