The activity of a radioactive sample is `1.6` curie, and its half-life is `2.5 days`. Its activity after `10 days` will be

The activity of a radioactive substance is readuced by 80% in 100 days. Its half life is

The activity of a radioactive sample drops fo 1//32 of its initial value in 7.5 h. Find the half life ?

Activity of a radioactive sample decreases to (1//3)rd of its original value in 3 days. Then in 9 days its activity will become

Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become

Define the Activity of a radioactive sample. Write its S.I. unit. A radioactive sample has activity of 10000 disintegrations per second (dps) after 20 hours. After next 10 hours its Activity reduces to 5000 dps. Find out its half-life and initial activity.

The acticity of a sample is 64 xx 10^-5 Ci . Its half-life is 3 days. The activity will become 5 xx 10^-6 C i after.

After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. Find the initial activity of the sample in dps.

Activity of a radioactive sammple decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become

(3/4) of a radioactive sample decays in 2.5 days. The half life in days is