Problem P. 4411. (January 2012)
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?
Deadline expired on February 10, 2012.
Sorry, the solution is available only in Hungarian. Google translation
Megoldás. Kb. 7,2 nap a felezési ideje.
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.