Problem P. 4669. (October 2014)

P. 4669. Uranium-238 is an alpha-decaying isotope, its half-life is 4.5-billion years. How many atoms are there in that Uranium block in which on average one atom decays in each

\(\displaystyle a)\) second;

\(\displaystyle b)\) hour;

\(\displaystyle c)\) day;

\(\displaystyle d)\) year?

(4 pont)

Deadline expired on November 10, 2014.

Statistics:

84 students sent a solution.
4 points:	56 students.
3 points:	8 students.
2 points:	3 students.
1 point:	5 students.
0 point:	12 students.

Problems in Physics of KöMaL, October 2014