Question

Prove 1 j=10 power 7 erg

Answer 1

joule is a unit of energy. erg is in CGS system.

work done = Force * Displacement

1 joule = 1N * 1m

1 newton = 1 kg m/s^2

1kg = 1000 g, 1m = 100cm

1 newton equal to 1000g m/s^2

1 metre = 100 cm

1 joule = 1000 * 100 g cm^2 s^-2

1 joule = 10^7 erg