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.

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 sample is 1.6 curie, and its half-life is 2.5 days . Its activity after 10 days will be

What will be the activity of 0.5 g sample of ""_(92)U^(238) if its half-life against a-decay is 1.5 xx 10^(17) s?

A sample has 4 xx 10^16 radioactive nuclei of half-life 10 days. The number of atoms decaying in 30 days is.

A radioactive sample with half-life 2 days has initial activity 32mu Ci . What will be its activity after 8 days?

A sample of .^32P initially shows activity of one curle.After 303 days the activity falls to 1.5 xx 10^(4) dps.What is the half life of .^32P ?

A solution contains a mixture of two isotopes A (half-life=10days) and B (half-life=5days). Total activity of the mixture is 10^10 disintegration per second at time t=0 . The activity reduces to 20% in 20 days. Find (a) the initial activities of A and B, (b) the ratio of initial number of their nuclei.