The masses of neutron and proton are 1.0087 a.m.u. and 1.0073 a.m.u. respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass 4.0015 a.m.u the binding energy fo the helium nucleus will be (1 a.m.u. =931 MeV)
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Atomic weight of boron is 10.81 and it has two isotopes 5B10 and 5B11. Then ratio of 5B10: 5B11 in nature would be
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The mass defect in a particular nuclear reaction is 0.3 grams.The amount of energy liberated in kilowatt hour is(Velocity of light = 3 × 108m/s)
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1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is
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A radioactive nucleus undergoes a series of decay according to the scheme
\(A\overset{a}{\rightarrow}A_{1}\overset{\beta }{\rightarrow}A_{2}\overset{\alpha }{\rightarrow}A_{3}\overset{\gamma }{\rightarrow}A_{4}\)If the mass number and atomic number of ‘A’ are 180 and 72 respectively, then what are these numbers for A4
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An archaeologist analyses the wood in a prehistoric structure and finds that C14 (Half life = 5700 years) to C12 is only one-fourth of that found in the cells of buried plants.The age of the wood is about
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The ratio of half-life times of two elements A and B is \(\frac{T_{A}}{T_{B}}\).The ratio of respective decay constant AB,\(\frac{\lambda _{A}}{\lambda _{B}}\)is
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The fossil bone has a 14C :12C ratio, which is \(\left [ \frac{1}{16} \right ]\) of that in a living animal bone. If the half-life of 14C is 5730 years,then the age of the fossil bone is
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If 200 MeV energy is released in the fission of a single U235 nucleus, the number of fissions required per second to produce 1 kilowatt power shall be (Given 1eV = 1.6 × 10–19J)
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