When a uranium isotope is bombarded with a neutron, it generates , three neutrons and :
Radioactive material '' has decay constant '' and material '' has decay constant ''. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be ?
For a radioactive material, half-life is minutes. If initially there are number of nuclei, the time taken (in minutes) for the disintegration of nuclei is?
In the reaction . If the binding energies of and are respectively and (in MeV), then the energy(in MeV) released in this reaction is:
The Binding energy per nucleon of and nucleon are and , respectively. In the nuclear reaction , the value of energy released is
The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio 1:7 in a sample of a given rock. The age of the rock is estimated to be