Mathematical and Physical Journal
for High Schools
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Problem P. 4209. (December 2009)

P. 4209. As an average we take breath 18 times in every minutes, and approximately 500 cm3 is inhaled in each breath. The O2 content of the inhaled air is 21%, and that of the exhaled air is 16%. The temperature of the air in the lungs is the same as the body temperature.

How many grams of O2 is consumed in a day?

(4 pont)

Deadline expired on January 11, 2010.

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

Megoldás. Kb. 820 g.


186 students sent a solution.
4 points:107 students.
3 points:27 students.
2 points:26 students.
1 point:18 students.
0 point:7 students.
Unfair, not evaluated:1 solutions.

Problems in Physics of KöMaL, December 2009