Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem P. 4623. (March 2014)

P. 4623. A magnetized pin, axed through its centre of mass, swings 24 times in one minute if its axle is vertical. How many swings does the pin make if its axle is horizontal and

a) parallel to the magnetic meridian;

b) perpendicular to the magnetic meridian?

The declination of the magnetic field at the position of the observation is 60o.

(5 pont)

Deadline expired on April 10, 2014.

Sorry, the solution is available only in Hungarian. Google translation

Megoldásvázlat. Az $\displaystyle a)$ esetben kb. 32-t, a $\displaystyle b)$ esetben pedig kb. 34-et leng percenként.

### Statistics:

 24 students sent a solution. 5 points: Antalicz Balázs, Asztalos Bogdán, Balogh Menyhért, Bencsik Bálint, Berta Dénes, Blum Balázs, Bugár 123 Dávid, Csathó Botond, Farkas Tamás, Fehér Zsombor, Forrai Botond, Holczer András, Horicsányi Attila, Janzer Barnabás, Juhász Péter, Krokos Ádám László, Lőrincz Zoltán, Olosz Balázs, Rózsa Tibor, Sal Kristóf, Trócsányi Péter. 3 points: 1 student. 0 point: 2 students.

Problems in Physics of KöMaL, March 2014