Mathematical and Physical Journal
for High Schools
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Problem P. 3951. (January 2007)

P. 3951. Cloud droplets of diameter 0.01 mm are charged to a potential of 1 mV and unite into droplets of diameter 0.1 mm. What is the voltage of this new droplet? By what factor is the speed of fall of the big droplet greater than the that of the small one?

(4 pont)

Deadline expired on February 12, 2007.


Statistics:

74 students sent a solution.
4 points:Almási 270 Gábor András, Almasi Susann Melinda, Berta Katalin, Blastik Zsófia, Bozsér Kata, Bőle Pál, Csengeri Béla, Deli Gábor, Farkas Ádám László, Fekete Zsolt, Filep Tibor, Földes Tamás, Győry Erika, Horváth 795 Andrea, Hujter Bálint, Köffer Ákos, Krämer Zsolt, Lovas Lia Izabella, Megyeri Balázs, Mester Balázs, Nagy 224 Csaba, Nagy Zsolt Péter, Nyíri Dávid Ákos, Pálovics Róbert, Pásztor Árpád, Pósa László, Roósz Gergő, Somogyi József, Sümegi Károly, Szegvári István, Szűcs Gergely, Szük Dániel, Takács 484 Marcell, Tolnai Gábor, Tolner Ferenc, Tóth 123 László, Tóth 796 Balázs, Tüzes Dániel, Vécsi Áron.
3 points:14 students.
2 points:7 students.
1 point:10 students.
0 point:3 students.
Unfair, not evaluated:1 solution.

Problems in Physics of KöMaL, January 2007