Mathematical and Physical Journal
for High Schools
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# Problem P. 4594. (January 2014)

P. 4594. Compare the sight of a sparkler on the christmas tree, with the splendour light of the firework show at the new year's eve.

a) In case of the sparkler why can't we observe such expanding, glowing fireballs or fire-wheels (glowing sharpnels which spred out in a plane) as we can see in case of the fireworks?

b) Is it possible to observe elliptical fire-wheels'' during a firework display?

(3 pont)

Deadline expired on February 10, 2014.

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

Megoldásvázlat. a) A csillagszóróról nem egyszerre indulnak el a ,,repeszek''.

b) Igen, ha ,,ferdén'' nézünk rá a tűzkerékre.

### Statistics:

 28 students sent a solution. 3 points: Alabér Ádám, Eper Miklós, Kácsor Szabolcs, Kertész Soma Marcell, Landon Chow, Nenezic Patrick Uros, Olexó Tünde, Rossen Péter, Szépfalvi Bálint. 2 points: Ardai István Tamás, Bakó Máté, Bencsik Bálint, Beregi Ábel, Egyedi Balázs, Kálmán Bence, Karosi Gábor, Kenderes Anett, Kontra Bence, Kraudy Roland, Mile Alexander, Muth Lajos, Olajos Zsombor, Radnai Bálint, Szigyártó Anna, Tanner Martin. 1 point: 2 students. 0 point: 1 student.

Problems in Physics of KöMaL, January 2014