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Problem G. 797. (December 2022)

G. 797. An inflated balloon is attached to the open end of a liquid-column manometer. The difference in the level of petroleum in the two arms of the manometer is 72 cm. How many mm would the difference in level be if the manometer contained mercury? What is the gauge pressure (excess pressure) in the balloon?

(3 pont)

Deadline expired on January 16, 2023.


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

Megoldás. A léggömbben a túlnyomás

\(\displaystyle \Delta p=\varrho_\text{petróleum}\,g h=850~\frac{\rm kg}{\rm m^3}\cdot 9{,}8~\frac{\rm N}{\rm kg}\cdot 0{,}72~\rm m=6~\rm kPa.\)

Ekkora nyomáskülönbség a higanyos manométerben

\(\displaystyle h'=\frac{\varrho_\text{petróleum}}{\varrho_\text{higany}}\,h=\frac{850}{13\,600}\,0{,}072~\rm m\approx 45~\rm mm\)

szintkülönbséget hoz létre.


Statistics:

50 students sent a solution.
3 points:Bencze Mátyás, Biró Kata, Bor Noémi, Csapó András, Cseresznye Ákos, Egyházi Godó, Földi Albert, Hornok Máté, Hübner Lilla, Jávor Botond, Kiss 668 Benedek, Ligeti Barnabás, Nagy 639 Csenge, Sós Ádám, Sukola Bence, Sütő Áron, Szabó 926 Bálint, Szabó 926 Bence, Szatmári Emese, Tajta Sára, Toplak Ágnes, Varga 802 Zsolt, Zámbó Luca.
2 points:Antal Áron, Balázs Barnabás, Csipkó Hanga Zoé , Csordás Kevin, Darvas Kristóf, Dudás Szilárd, Fercsák Flórián, Ivanyik Dávid, Jacsman Vencel , Konkoly Zoltán, Matyó Simon, Pituk Péter, Suba Gergő Dávid, Szendrői Bori , Wolf Erik, Žigo Boglárka.
1 point:1 student.
0 point:2 students.
Unfair, not evaluated:7 solutionss.

Problems in Physics of KöMaL, December 2022