The energy equivalent of 1 ,g of substance is | vedclass

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(D) Using Einstein's mass-energy equivalence formula: $E = mc^2$.Given mass $m = 1 \,g = 10^{-3} \,kg$.Speed of light $c = 3 	imes 10^8 \,m/s$.$E = (

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$5.6 	imes 10^{26} MeV$

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(D) Using Einstein's mass-energy equivalence formula: $E = mc^2$.Given mass $m = 1 \,g = 10^{-3} \,kg$.Speed of light $c = 3 	imes 10^8 \,m/s$.$E = (10^{-3} \,kg) 	imes (3 	imes 10^8 \,m/s)^2 = 9 	imes 10^{13} \,J$.To convert Joules to $MeV$, we use the conversion factor $1 \,eV = 1.602 	imes 10^{-19} \,J$, so $1 \,MeV = 1.602 	imes 10^{-13} \,J$.$E = \frac{9 	imes 10^{13} \,J}{1.602 	imes 10^{-13} \,J/MeV} \approx 5.618 	imes 10^{26} \,MeV$.Thus, the energy equivalent is approximately $5.6 	imes 10^{26} \,MeV$.

The energy equivalent of $1 \,g$ of substance is:

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