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It is taken into account. See figure 2.5.4 and the subsequent calculations. But, it cancels out of the final equation for SHM. Once...

This doesn't take into account that the equilibrium position depends on gravity. See the analysis I linked to.

Have you ever studied a mass oscillating vertically on a spring? It might be easier to look at that problem first and figure out why...

Why not add GPE to the analysis and see what equations you get?

Here is an explanantion of why the quantum eraser does not imply retrocausality:

How does this formula compare to the well-verified results from QED? In particular, where does Planck's constant ##h## enter it?

I was a professional programmer and a student of math. If you want to write reliable programs then I recommend writing them much like...

That quote is generally said in the context of the humanities - math is significantly easier to learn these days thanks to improved...

Number #1 on the country charts. It's better than most songs on the country charts. Today's country hits tend to feature thick phony...

I have some solemn news to report. Many in the community had been wondering where the prolific @Vanadium 50 has been. V50 hasn't posted...

I see. I have to be clear about what ##\Delta x## actually represents, whether it represents ##x_{final}-x_{initial}## or...

Strictly speaking, the mass of the exhaust gases is not itself a "delta". Instead, with ##m## as the mass of the rocket: $$m_{final} =...

Note that under all circumstances: ##\frac{dX}{dt}## is the limit of ##\dfrac{X_{final} - X_{initial}}{t_{final} - t_{initial}}##. You...

It's simpler than that. Strictly speaking, ##\Delta X## has a well-defined meaning as the difference in quantity ##X##, with the...

Theoretical physicist C.N. Yang died at the age of 103 years on October 18, 2025. He is the Yang in Yang-Mills theory, which he and his...