Question

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Answer 1

Answer:

ans of 47 : option (b)

reason

Because this is a ratio of like-dimensioned physical quantities, it is a dimensionless quantity, a function of the dimensionless physical constants, and has numerical value independent of the system of units, namely: μ = mp/me = 1836. 15267343

ans of 48 : option c

Decay scheme of a radioactive sodium-24 (24Na) nucleus. With a half-life of 15 hours, it decays by beta decay to an excited magnesium-24 (24Mg) nucleus. Two gamma rays are rapidly emitted and the excitation energy is carried off, whereby the stable ground state of magnesium-24 is reached.

Answer 2

Answer:

Option C

Option A

Option B

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