Answer :

a) Given, half-life = 14 minutes = 840 seconds

We know, half life , where λ = decay constant

= 8.25×10-4 s-1


[equation of neutron undergoing β decay]


Mn = mass of Neutron

Mp = mass of proton

Mβ = mass of β-particle

c2= (Speed of light)2 = 931.5 MeV/u

= 782.83 KeV

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