A radioactive sample disintegrates by `10%` during one month. How much fraction will disintegrate in four months :-

(3)/(4) part of a radioactive sample disintegrates in first 10 yrs. How much fraction will disintegrate in first 20 Yrs ?

36% amount of a radioactive sample disintegrates in t time. Calculate how much percentage fraction will decay in t//2 time.

7//8 fraction of a sample disintegrate in t time How much time it will take to disintegrate 15 //16 fraction :

Suppose a radioactive substance disintegrates completely in 10 days. Each day it disintegrates at a constant rate which is twice the rate of the previous day. The percentage of the material left to be disintegrated after passing of 9 days is :

A radioactive sample has a disintegration rate of 36 xx 10^(50) disintegration per minute. The sample itself consisting of 10^(-5) mu mole of the active nuclei. The disintegration constant, lambda is given by

A radioactive element is disintegrating having half-life 6.93 s. The fractional change in number of nuclei of the radioactive element during 10 s is

A radioactive element is disintegrating having half-life 6.93 s. The fractional change in number of nuclei of the radioactive element during 10 s is

A radioactive element disintegrates for a time interval equal to its mean life. The fraction that has disintegrated is

A radioactive element disintegrates for a time interval equal to its mean life. The fraction that has disintegrated is