Mathematical and Physical Journal
for High Schools
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Problem P. 4152. (March 2009)

P. 4152. The filament of an incandescent lamp of power 100 W is made of Tungsten. The operation temperature of the lamp is 2400 K. Consider the filament a black body and give an estimation for the surface area, the cross section, and the length of the filament.

(5 pont)

Deadline expired on April 14, 2009.


Statistics:

48 students sent a solution.
5 points:Galzó Ákos Ferenc, Hartstein Máté, Márkus Bence Gábor, Mayer Martin János, Pálovics Péter.
4 points:Bodosi Eszter, Boros Csanád Örs, Börcsök Bence, Budai Ádám, Csóré András, Deák Zsolt, Emroz Khan, Englert Dávid, Filep Gábor, Filep Tibor, Garaguly Gergő, Jakab Dávid, Kaposvári István, Kardos Örs, Kovács 235 Gábor, Krämer Zsolt, Lovas Lia Izabella, Maknics András, Pázmán Koppány, Rácz Viktor, Réti Dávid, Sós Attila Róbert, Török 999 Csaba.
3 points:5 students.
2 points:5 students.
1 point:9 students.
0 point:1 student.

Problems in Physics of KöMaL, March 2009