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E = M c2

M = 4 kg
c = 3 x 108 meters/sec

E = (4) (3 x 108)2 = 3.6 x 1017 kg-m2/sec2 = 3.6 x 1017 newton-meter

= 3.6 x 1017 Joules

( 36% of one million-million-million joules )

( 100,000,000,000 kilowatt-hours )

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Related Questions

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