24 years
20 years
10 years
2 years
Correct answer is B
1/64 is the usual fraction left of any radio active material after 4 half-lives, since 1/64 = (1/2)6
This implies that 6 half lives have elapsed.
Thus 6 half lives = 120 years
∴ 1 half life = 120/6 = 20 years
A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?...
For a best result using temperature to achieve an accurate measurement, it is best to use ...
Which of the following waves is not transverse ...
Which of the following particles conduct electricity through salty water? ...
Out of the following pairs, which one does not have identical dimension? ...