The binding energy per nucleon of .37Li and .24He nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear reaction .37Li+.11H→.24He+.24He+Q, the value of energy Q released is
A radioactive source in the form of metal sphere of diameter 10−3 m emits beta particle at a constant rate of 6.25×1010 particles per second. If the source is electrically insulated, how long will it take for its potential to rise by 1.0 volt, assuming that 80% of the emitted beta particles escape from the source?
Imagine that a reactor converts all given mass into energy and that it operates at a power level of 109 watt. The mass of the fuel consumed per hour in the reactor will be : (velocity of light, c is 3×108m/s)
The nuclear fusion reaction2H2→2He4+Energy , is proposed to be used for the production of industrial power. Assuming the efficiency of process for production of power is 20%, find the ass of the deuterium required approximately for a duration of 1 year. Given mass of 1H2 nucleus = 2.0141 a.m.u and mass of2He4 nuclei = 4.0026 a.m.u and 1 a.m.u. = 31 MeV
One gram of a radioactive sample of half-life 10 min is sealed in a capsule at time t=0. Amount of sample decayed up to 5 min is
The radius of germanium (Ge) nuclide is measured to be twice the radius of .49Be. The number of nucleons in Ge are
A sample contains 16 gm of a radioactive material, the half-life of which is two days. After 32 days, the amount of radioactive material left in the sample is
The normal activity of living carbon-containing matter is found to be about 15 decays per minute for every gram of carbon. This activity arises from the small proportion of radioactive 614C present with the stable carbon isotope 612C. When the organism is dead, its interaction with the atmosphere (which maintains the above equilibrium activity) ceases and its activity begins to drop. From the known half-life ( 5730 years) of 614C, and the measured activity, the age of the specimen can be approximately estimated. This is the principle of 614C dating used in archaeology. Suppose a specimen from Mohenjodaro gives an activity of 9 decays per minute per gram of carbon. Estimate the approximate age of the Indus-Valley civilisation.