A radioactive material decays by simultaneous emission of two particles of half lives 1620 and 810 years. The time (in years) after which one-fourth of the material remains, is

A radiacative moterial docays by simulataneous emission of two particle from the with respective half - lives 1620 and 810 year . The time , in year , after which one - fourth of the material remins is

A radioactive material decays by simultaneous emissions of two particles with half lives of 1400 years and 700 years respectively. What will be the time after the which one third of the material remains ? (Take ln 3 = 1.1)

A radioactive material decays by simultaneous emission of three particles with respective half lives t_(1),t_(2),t_(3) minutes.The time in minutes after which (1)/(3) rd of material remains undecayed is

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 -

For a substance, the average life for alpha -emission is 3240 years and for beta emission is 810 years. After how much time (in years) the one-fourth of the material remains by simultaneous emission? (ln 2=0.693) (Round of the answer to nearest integer.)

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 X decays via two processes to produce Y&Z parallely with half live 1hr and 2hr resp. Find effective half life

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