Question

Mass equivalent to the energy $931$ MeV is:

• A. $6.02\times {10}^{-27}kg$
• B. $1.662\times {10}^{-27}kg$
• C. $16.66\times {10}^{-27}kg$
• D. $16.02\times {10}^{-27}kg$

Answer 1

The correct option is B $1.662\times {10}^{-27}kg$

Let us back calculate
$Q=931\times {10}^{6}evSo,931\times {10}^6=\Delta m.(3\times {10}^8)\Delta m=\frac{931\times {10}^6}{3\times {10}^8}a.m.u=310\times {10}^{-2}=3.10a.m.u=1.662\times {10}^{-27}kg$