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प्रश्न
Write any two characteristic features of nuclear forces ?
उत्तर
Characteristic features of nuclear forces are-
(i) Nuclear forces are much stronger then coulomb forces acting between charges or the gravitational forces between masses.
(ii) The nuclear force between neutron-neutron, proton-neutron and proton-proton is approximately the same. The nuclear force does not depend on the electric charge.
संबंधित प्रश्न
An α-particle is bombarded on 14N. As a result, a 17O nucleus is formed and a particle is emitted. This particle is a
Find the energy liberated in the reaction
223Ra → 209Pb + 14C.
The atomic masses needed are as follows.
223Ra 209Pb 14C
22..018 u 208.981 u 14.003 u
Calculate the minimum energy needed to separate a neutron from a nucleus with Zprotons and N neutrons it terms of the masses MZ.N' MZ,N−1 and the mass of the neutron.
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In the decay 64Cu → 64Ni + e+ + v, the maximum kinetic energy carried by the positron is found to be 0.650 MeV.
(a) What is the energy of the neutrino which was emitted together with a positron of kinetic energy 0.150 MeV?
(b) What is the momentum of this neutrino in kg m s−1?
Use the formula applicable to a photon.
Carbon (Z = 6) with mass number 11 decays to boron (Z = 5). (a) Is it a β+-decay or a β−decay? (b) The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90% carbon-11 and 10% boron-11 (by the number of atoms) converts itself into a mixture of 10% carbon-11 and 90% boron-11?
Nuclear mass M is found to be ______.
For measuring the nuclear masses, we use
Define unified atomic mass unit.
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