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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 points)

Deadline expired on 12 October 2009.

Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldás. $\displaystyle 0,4~cm^3$.

Statistics on problem P. 4178.
 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

•  Támogatóink: Morgan Stanley