A radioactive material has mean lives of 1620 years and 660 years for `alpha` and `beta` emissions respectively the material decays by simultaneous `alpha and beta` emission. The time in which `(1)/(4)th` of the material remains intact is-

A radioactive material has mean lives of 1620 yr and 520 yr for alphaandbeta-"emission" , respectively. The material decays by simultaneous alphaandbeta-"emissions . The time in which 1/4th of the material remains intact is

A radioactive material has mean lives of 1620 yr and 520 yr for alphaandbeta-"emission" , respectively. The material decays by simultaneous alphaandbeta-"emissions . The time in which 1/4th of the material remains intact is

A radioactive material has a half life of 600 years and 300 years for alpha and beta emissions respectively. The material decays by simultaneous alpha and beta emissions respectively . The material decays by simultaneously alpha and beta emissions . What is time in which 3/4 th of the material will decay ?

A radioactive material has a half life of 600 years and 300 years for alpha and beta emissions respectively. The material decays by simultaneous alpha and beta emissions respectively . The material decays by simultaneously alpha and beta emissions . What is time in which 3/4 th of the material will decay ?

The mean lives of a radioactive material for alpha and beta radiations are 1620 and 520 years respectively . The material decays simultaneously for alpha and beta radiations. The time after which one fourth of the material remains undecayed in -

The half lives of a radioactive sample are 30 years and 60 years from alpha - emission and beta - emission respectively If the sample decays both by alpha-emission and beta -emission simultaneously, the time after which, only one-fourth of the sample remain is

Half lives for alpha and beta emission of a radioacative materila are 16 years and 48 years respectively. When material decays giving alpha and beta emission simultaneously, time in which 3//4^(th) material decays is .

Half lives for alpha and beta emission of a radioacative materila are 16 years and 48 years respectively. When material decays giving alpha and beta emission simultaneously, time in which 3//4^(th) material decays is .

The half lives of a radioactive sample are 30 years and 60 years from alpha- emission and beta- emission respectively. If the sample decays both by alpha- emission and beta- emission emission simultaneously, the time after which only one-fourth of the sample remain is