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  4. The energy equivalent of 0.5 g of a substance is:

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Q. The energy equivalent of 0.5 g of a substance is:

NEETNEET 2020Dual Nature of Radiation and Matter

Solution:

From mass-energy equivalence,
$E=mc^{2}$
$=0.5\times 10^{-3}\times 9\times 10^{16}$
$=4.5 \times 10^{13}\,J$