Mathematical and Physical Journal
for High Schools
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# Problem P. 4754. (September 2015)

P. 4754. 4 litres of water at a temperature of $\displaystyle 30\,^\circ$C is poured into a copper hemisphere shaped container of volume $\displaystyle 4~{\rm dm}^3$. The temperature of water decreases by $\displaystyle 3\,^\circ$C, whilst the temperature of the container increases by $\displaystyle 27\,^\circ$C. What is the width of the wall of the container?

(4 pont)

Deadline expired on October 12, 2015.

### Statistics:

 150 students sent a solution. 4 points: 107 students. 3 points: 32 students. 2 points: 8 students. 1 point: 2 students. 0 point: 1 student.

Problems in Physics of KöMaL, September 2015