Hi!

We know from physics that , where E is the energy, P the power and t the time.

If we have , that is, power as a function of time, we could integrate this expression from , and get the total energy.

Here is where I am confused.

Which is correct?

Because usually, . This looks like the second one.

But i also makes sense to think about as some "energy strip" , with height P and width dt.

Kinda want this cleared out.

Thx!