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KCET2018PhysicsNuclear Physics

The energy equivalent to a substance of mass ( 1 ~g ) is

Options

  1. A( 18 10^ (13) J )
  2. B( 9 10^ (13) J )
  3. C( 18 10⁶ ~J )
  4. D( 9 10⁶ ~J )

Correct answer

B. ( 9 10^ (13) J )

Step-by-step solution

We know E=m c² Given m=1 ~g =1 10⁻³ ~kg We know c=3 10⁸ ~ms ⁻¹ E= (1 10⁻³ ) (3 10⁸ )²=9 10¹³ Therefore, energy equivalent to a substance of mass 1 ~g is 9 10¹³ ~J

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