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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

If the rest energies of a proton and a neutron (the two constituents of nuclei) are 938.3 and 939.6 MeV respectively, what is the difference in their masses in kilograms?

To determine

The difference in mass of proton and neutron.

Explanation

Given info:

  • The rest energies of proton are 938.3MeVand rest energy of neutron is 939.6MeV.

Formula used:

Formula to find the difference in rest mass of proton and neutron is,

  Δm0=ΔE0c2

Here, Δm0is the difference in rest mass, ΔE0is the difference in rest mass energy, cis the speed of light.

Calculation:

Substituting the given value, we get,

  Δm0=(939.6MeV938.3MeV)(3×108ms-1)2=1

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