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A nucleus kept at rest in free space, br...

A nucleus kept at rest in free space, brakes up into smaller nuclei of masses `'m'` and `'2m'`. Total energy generated in this fission is `E`. The bigger part is radioactive, emits five gamma ray photons in the direction opposite to its velocity and finally comes torest. `["Given" h=6.6xx10^(-34)Js,m=1xx10^(-26)Kg,E= 3.63xx10^(-8) mc^(2), C=3xx10^(8)m//s)`
The wavelength of the gamma ray is

A

`0.02 Å`

B

`0.03 Å`

C

`0.04 Å`

D

`0.05 Å`

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Calculate the speed of the electron in the first Bohr orbit given that h=6.6xx10^(-34) Js, m=9.11xx10^(-31) kg and e=1.603xx10^(-19) C .

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