Question

how i get this?please tell me gast

Answer 1

1 ergs = 10^ -7 Joules

So 3 × 10 ^ -12 ergs
= 3 x 10 ^-12 × 10^ -7 joules
= 3 x 10 ^ ( -12 ) + ( - 7 ) joules
= 3 x 10 ^ -12 - 7 Joules
= 3 x 10 ^ - 19 Joules

Planck' Constant
= 6.62 × 10^ -27 ergs
= 6.62 x 10^-27 × 10^ -7 joules
= 6.62 × 10 ^ (-27) + ( -7) Joules
=6.62 × 10 ^ -27 - 7 Joules
=6.62 × 10 ^ - 34 Joules

1 cm = 10^ -2 m
Speed of light
= 3 x 10 ^ 10 cm
= 3 x 10 ^ 10 x 10 ^-2 m
= 3 x 10 ^ 10 - 2 m
= 3 x 10 ^ 8 m