Q. 27 D 5.0( 2 Votes )

Calculate the energy released in joules when 5 g of a material is completely converted into energy during a nuclear reaction.

Answer :

Mass of material,

m = 5g = 0.005kg,

Speed of light, c = 3 x 108m/s

We know that, E = mc2

E = 0.005 x (3 x 108)2

E = 4.5 x 1014J

Hence, energy released= 4.5 × 1014J

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