Mathematical and Physical Journal
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Problem P. 4633. (April 2014)

P. 4633. The working substance of a heat engine is a sample of monatomic ideal gas of specific mass. The gas may be taken through the cyclic process \(\displaystyle ABCA\) or \(\displaystyle ADEA\) as shown in the figure. What is the ratio of the two efficiencies?

(5 pont)

Deadline expired on May 12, 2014.


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

Megoldásvázlat. \(\displaystyle \frac{\eta_{ABCA}}{\eta_{ADEA}}=\frac{4}{7}.\)


Statistics:

59 students sent a solution.
5 points:Asztalos Bogdán, Berta Dénes, Bősze Zsófia, Bugár 123 Dávid, Büki Máté, Csathó Botond, Csordás Gábor, Elahe Ahmadi, Fehér Zsombor, Fekete Panna, Forrai Botond, Gróf Tamás, Holczer András, Horicsányi Attila, Horváth 974 Bence Attila, Janzer Barnabás, Kacz Dániel, Kaposvári Péter, Kasza Bence, Kenderes Anett, Krokos Ádám László, Lőrincz Zoltán, Marosvári Kristóf, Morvay Bálint, Nagy Zsolt, Németh 017 András, Németh Flóra Boróka, Olosz Balázs, Öreg Botond, Pázmán Zalán, Sal Kristóf, Sárvári Péter, Seress Dániel, Szántó Benedek, Szász Norbert Csaba, Tanner Martin, Varju Ákos, Wiandt Péter.
4 points:Alabér Ádám, Antalicz Balázs, Balogh Menyhért, Berczi Benjámin, Blum Balázs, Di Giovanni Márk, Dinev Georgi, Molnár 128 Szilárd, Pipis Bence, Szentivánszki Soma , Szépfalvi Bálint.
3 points:8 students.
2 points:2 students.

Problems in Physics of KöMaL, April 2014