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CBSE Class 12-science Answered

claculate the energy equivalent of 1 g of substance.
Asked by prerna.naga | 09 May, 2019, 08:51: AM
answered-by-expert Expert Answer
m = 1 g = 10-3 kg 
and speed of light, c = 3 x 108 m/s 
 
Thus, according to Eistein's mass-energy relation,
E = mc2 
 
E = 10-3 x (3 x 108)2 
E =  9 x 1013 J 
 
Thus, energy equivalent to substance of mass 1 g is 9 x 1013 J 
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