Question

Calculate the energy equivalent of 1g of substance.

Answer 1

answer : 9 × 10¹³ J

explanation : mass of substance , m = 1g = 10^-3 kg

velocity of light , v = 3 × 10^8 m/s

according to Enstien's energy - mass equivalent theory, Mass can be converted into pure energy . it is expressed by $E=mc^2$

= 10^-3 × (3 × 10^8)²

= 10^-3 × 9 × 10^16 J

= 9 × 10¹³ J

hence, 9 × 10¹³ J amount of energy is equivalent of 1g of substance.

Answer 2

Explanation:

answer : 9 × 10¹³ J

explanation : mass of substance , m = 1g = 10^-3 kg

velocity of light , v = 3 × 10^8 m/s

according to Enstien's energy - mass equivalent theory, Mass can be converted into pure energy . it is expressed by E=mc^2E=mc2