Question

The mass defect in a particular nuclear reaction is 0.3 grams. The amount of energy liberated in kilowatt hours is (Velocity of light = 3 ×10⁸ m/s )
(a) 1.5 ×10⁶
(b) 2.5 ×10⁶(c) 3 ×10⁶
(d) 7.5 × 10⁶

Answer 1

Hope this help.......

Answer 2

Answer:

d) 7.5 × 10⁶

Explanation:

The mass defect in a particular nuclear reaction = 0.3 gms (Given)

Thus, mass defect will be -

Δm = 0.3%×1

=3×10`³

The energy released in nuclear fusion reaction is given by - E = Δmc²

Thus, according to the formula -

E = Δm.c²

= E =0.3/1000 × (3 × 10`8)²

= 2.7 × 10`13J    

= 2.7 × 10`13/ 3.6 × 10⁶

= 7.5 × 10⁶

Therefore,  the amount of energy liberated in kilowatt hours is 7.5 × 10⁶ Kwh.