PeroK's latest activity

For in that metric tensor, What curvature may come, When we have shuffled off comoving time, Must give us pause. And rather bear the...

Using the bounds on the definite integral is important in these cases, as it simplifies things considerably. For example, you could try...

All three terms have minus signs there, when you expand it out.

What you posted in post #7 is consistent with the integral calculator answer. It looks like you got a minus sign confused in the final...

Why do you think that's wrong?

I'm not sure why you are calculating an indefinite integral. The first rule of mathematical physics is that the first term in a parts...

I'm struggling to see what you are doing with integration by parts. I applied parts twice, with the initial tern vanishing at both end...

I'm not an experimentalist. Hopefully, someone else on here can give you a satisfactory answer. In the meantime, you could do your own...

So are we! :welcome:

I got my degrees in general physics and geophysics and it’s been a long time since then and I am having a hell of a time finding people...

What you need is a Photo(n)multiplier: https://en.wikipedia.org/wiki/Photomultiplier_tube

Let's take that as your argument that physics generally is no good. So, what do we do? Get out the new-age crystals? Rely on ancient...

##u=x^2+\pi +1##

You have $$a = v \frac{dv}{dx}$$ where ##x## is the displacement. As the block initially moves to the right, you have ##x=s##, so the...

it is not simple harmonic motion