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The activity of a radioactive sample is measured as no counts Per minute at t=o and No counts Per minute t=5 min The time (in min) at which activity reduces to half its value is
$\triangle E= E_4 - E_1 = {-13.6 \over 4} - ({-13.6 \over 1})= 0.85 +13.6 = 12.75 ev$
A heavy nucleus at lest breaks into two fragments which fly off with velocities in the ratio 8:1 The ratio of radil of the fragments is
In mean life (T) Rest mass = $No/ e$ $ T = { 1 \over \lambda } \Rightarrow \lambda = {1 \over 5 } min ^{-1}$ $ N = N0e^{- \lambda t}$ $ N0/2 = N0e^{-1/5 t}$ $m2 = { 1\over 5}t $ $ {1 \over 2 } = e^{-1/5} t $ $ t = 5ln2$ $ 2^{-1} = e^{-1/5} t $ $ t = 5 log e^2$ $ 2^1 = e {1 \over 5 } t $
The Probability of survival of a radioactive nucleus for one mean life time is
In the nuclear decay below $ _ZX^A \rightarrow _{Z+1}Y^A \rightarrow _{Z-1}B^{A-4} \rightarrow _{Z-1}B^{A-4}$
$ _ZX^A \rightarrow _{Z+1}Y^A \rightarrow _{Z-1}B^{A-4} \rightarrow _{Z-1}B^{A-4}$
A nucleus $_n X ^m$ emist one -$ \alpha $ Particle and two $\beta$ Particle. The resulting nucleus is
$_nX^m \rightarrow _{n-2}X^{m-4} \rightarrow _nY^{m-4}$
Af a certain time, a radio active sample contains $2 \times 10^{20}$ atoms and disintegration rate is $3 \times 10 ^ {10}$ atom persec. When$2 \times 10^{15}$ atoms are Left to decay its disintegation rate will be
${dN \over df} = df \Rightarrow I = dN$ $ I^1 = \lambda N_1 $ $ I_2 = \lambda N_2 $ $ {I_1 \over N_1} = \lambda $ $ {I_1 \over N_2} = \lambda $ $\therefore {I_1 \over N_1} = { f_2 \over N_2} \Rightarrow I_2 = { I_2 \over N_1} \times N_2 = { 3 \times 10^{10} \times 2 \times 10^{15} \over 2 \times 10_20} = 3 \times 10^5 $
The radius of Ge nuclide is measured to be twice the radius of $_4^9Be$ . The number of nucleons in Ge are
$ R = Ro(a)^{1/3} = 2R = Ro(A){1/3}$ $ \therefore { 1 \over 2 } = ({ 9 \over A }) ^ { 1/3} = { 1 \over 8 } = { 9 \over A} \Rightarrow \therefore A =72 $
The ............... force is the strongest of all fundamental forces
The strongest of all fundamental forces is the nuclear force, also known as the strong nuclear force. It is responsible for holding the nuclei of atoms together and is much stronger than the other fundamental forces.
Which of the following force binds The particle in the nucleons ?
The force that binds particles in the nucleons (protons and neutrons) is the strong force, also known as the strong nuclear force. This is one of the four fundamental forces of nature and is responsible for holding the nuclei of atoms together. It is much stronger than the electromagnetic force, although it acts over a very short range.
Quarks - Quarks force is produced between -
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