A radioactive isotope has a half life of T years : How long will it take the activity to reduce to
1%of its original value?

A radioactive isotope has a half life of T years : How long will it take the activity to reduce to 3.125%

Half life .^87Ga is 78 h.How long will it take to decay 21% of sample of Ga?

If 2.0 g of a radioactive isotope has a half life of 20 hr, the half life of 0.5 g of the same substance is

The half life a first order reaction is1.7hr.How long will it take for 20% of the reactant to react?

A first order reaction has a specific rate constant of 10^(-2) sec^(-1) . How much time will it take for 20g of the reactant to reduce to 5g ?

A sonometer wire is subjected to a certain tension. If the tension is increased four times and the length of wire is reduced to half the original value, how is frequency of vibrations altered ?