3. The half life time of a radio active elements of x is the same as the mean life of another radioactive element Y. Initially they have same number of atoms, then :

(a) y will decay faster thean x (b) x will decay faster then y (c) x and y will decay at the same rate at all time (d) x and y will decay at the same rate initially

Answer

Answer : (a)

Explanation

Explanation : No answer description available for this question. Let us discuss.

4. A and B are two radioactive substance whose half lives are 1 and 2 years respectively. Initially 10g of A and 1g of B is taken. The time after which they will have same quantity remaining is :

(a) 3.6 years (b) 7 years (c) 6.6 years (d) 5 years

Answer

Answer : (c)

Explanation

Explanation : No answer description available for this question. Let us discuss.

Radioactivity » Exercise - 13. The half life time of a radio active elements of x is the same as the mean life of another radioactive element Y. Initially they have same number of atoms, then : (a) y will decay faster thean x (b) x will decay faster then y (c) x and y will decay at the same rate at all time (d) x and y will decay at the same rate initially

Radioactivity » Exercise - 14. A and B are two radioactive substance whose half lives are 1 and 2 years respectively. Initially 10g of A and 1g of B is taken. The time after which they will have same quantity remaining is : (a) 3.6 years (b) 7 years (c) 6.6 years (d) 5 years

Tags: years, radioactivity, exercise, radioactive, substance, half, initially, time, will, physics

Radioactivity » Exercise - 1 1. Plutonium decays with half life time 24000 years. If Plutonium is stored after 72000 years, the fraction of it that remain : (a) 1/2 (b) 1/4 (c) 1/8 (d) 1/12

Tags: radioactivity, plutonium, years, exercise, decays, half, life, time, physics

Radioactivity » Exercise - 12. A radioactive substance decays to 1/16th of its initial activity in 40 days. the half life of the radioactive substance expressed in day is : (a) 4 (b) 5 (c) 10 (d) 20