Question Bank - General Science

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Energy equivalent of mass 1 u is _______.

A.
911 MeV
B.
921 MeV
C.
931 MeV
D.
941 MeV

Solution:

SolutionThe correct answer is 931 Mev1 amu=1.66À”10?27kgAccording to Einstein's mass-energy equivalence, E=mc2 where c= velocity of light. So, E=1.66À”10?27À” (3À”108)2=14.94À”10?11 JE=(14.94À”10-11) / (1.6À”10-19 ) eV(1 eV=1.6À”10?19 J)Therefore E=931À”106eV =931 MeV

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