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P. 4411. In a sample initially there are equal number of atoms of two radioactive isotopes A and B. Three days later there are 3 times as much nucleides of isotope A than of isotope B, the halflife of which is 1.5 days. What is the half-life of isotope A?

(4 points)

Deadline expired on 10 February 2012.

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

Megoldás. Kb. 7,2 nap a felezési ideje.

Statistics on problem P. 4411.
 137 students sent a solution. 4 points: 105 students. 3 points: 3 students. 2 points: 4 students. 1 point: 15 students. 0 point: 9 students. Unfair, not evaluated: 1 solution.

• Problems in Physics of KöMaL, January 2012

•  Támogatóink: Morgan Stanley