1 J = 1 kg x m^-2 / s^-2
and, E = P x t
1 J = 1 W x 1 s
so, 1 kg x m^-2 / s^-2 = 1 kg x m^-2 / s^-3 x s ??
and now i don't have any idea where I am going with this.
Homework Statement
trying to show that the units W m-2 are equivalent to kg s-3
Homework Equations
1 W = 1 J s-1 ?
The Attempt at a Solution
energy per unit time?
p.s. I am very new to physics, a beginner in understanding the whole concept of units, any advice?