Mathematical and Physical Journal
for High Schools
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# Problem P. 4395. (December 2011)

P. 4395. In a container there is a sample of Hydrogen gas, its gauge pressure is 400 Pa. If a small valve (its diameter is some millimetres) at the top of the container is opened, then the initial speed of the leaking Hydrogen is 100 m/s. What was the temperature of the Hydrogen? (The ambient air pressure is 1 bar.)

(4 pont)

Deadline expired on January 10, 2012.

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

Megoldás. A Bunsen-féle kiáramlási törvény és a gáztörvény alapján számolva a hidrogén kb. $\displaystyle 28~^\circ$C-os.

### Statistics:

 103 students sent a solution. 4 points: 65 students. 3 points: 14 students. 2 points: 3 students. 1 point: 2 students. 0 point: 19 students.

Problems in Physics of KöMaL, December 2011