For a radioactive material
For a radioactive material, its activity A and rate of change of its activity R are defined as A = − dt/dN and R = − dt/dA , where N(t) is the number of nuclei at time t. Two radioactive sources P(mean life τ) and Q (mean life 2τ) have the same activity at t = 0. Their rates of change of activities at t = 2τ are RP and RQ, respectively. If RQ/RP = e/n , then the value of n is
16
Sep
For a radioactive material, its activity A and rate of change of its activity R are defined as A = − dt/dN and R = − dt/dA , where N(t) is the number of nuclei at time t. Two radioactive sources P(mean life τ) and Q (mean life 2τ) have the same activity at [...]
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For a radioactive material ,
its activity A and rate of change of its activity R are defined as A = − dt/dN and R = − dt/dA ,
respectively. If RQ/RP = e/n ,
then the value of n is ,
where N(t) is the number of nuclei at time t. Two radioactive sources P(mean life τ) and Q (mean life 2τ) have the same activity at t = 0. Their rates of change of activities at t = 2τ are RP and RQ ,
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is.
22
Aug
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is. For a radioactive material half-life is 10 minutes. If initially there are 600 number of nuclei the time taken (in minutes) for the disintegration of 450 nuclei [...]