Mathematical and Physical Journal
for High Schools
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Problem P. 4178. (September 2009)

P. 4178. A piece of chocolate is dropped into a glass of soda water. The density of the chocolate is 1,2 g/cm3 and its volume is 2 cm3. Carbon-dioxide bubbles begin to stick to the surface of the chocolate. What is the least total volume of the bubbles when the piece of chocolate begins to ascend?

(4 pont)

Deadline expired on October 12, 2009.

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

Megoldás. \(\displaystyle 0,4~cm^3\).


239 students sent a solution.
4 points:200 students.
3 points:3 students.
1 point:2 students.
0 point:21 students.
Unfair, not evaluated:13 solutions.

Problems in Physics of KöMaL, September 2009