Mathematical and Physical Journal
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Problem P. 4379. (October 2011)

P. 4379. The atomic mass number of Radium is A=226, its halflife is 1622 years. What is the activity of 1 g Radium? (Earlier this was the base of the unit of activity: 1 curie was the activity of 1 g radium.)

(3 pont)

Deadline expired on November 10, 2011.

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

Megoldás. Kb. \(\displaystyle 3{,}6\cdot 10^{10}~\)Bq.


95 students sent a solution.
3 points:70 students.
2 points:8 students.
1 point:16 students.
0 point:1 student.

Problems in Physics of KöMaL, October 2011