Mathematical and Physical Journal
for High Schools
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I want the old design back!!! :-)

Problem P. 4326. (March 2011)

P. 4326. A vessel, filled with water, is placed to a very accurate scale, and the reading on the scale is 308.48 g. A block which hangs on a spring balance is totally immersed into the water. Now the reading on the scale is 336.43 g. What is the reading on the spring balance if it was 1.75 N before the block was immersed into the water? What is the density of the block?

(3 pont)

Deadline expired on April 11, 2011.

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

Megoldás. A dinamométer 1,47 N-t mutat, és a test sűrűsége \(\displaystyle 6,37~\rm{g/cm}^3\).


134 students sent a solution.
3 points:84 students.
2 points:40 students.
1 point:7 students.
0 point:1 student.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, March 2011