Steve4Physics's latest activity

The way you've marked the 'cut' in your Post #3 diagram suggests that you may have misunderstood the method of sections. A suitable...

That would only be true if the tension in member OH were zero. But in the x-direction, the force-balance at point O is: ##-F~ +~...

FWIW there is a typo'. It should be ##\chi_n=e^{-i \frac { E_n}{\hbar} t}##.

Introductory textbooks usually deal a lot with time-independent Hamiltonians of the form$$H=\frac{\mathbf{P}^2}{2 m}+V(\mathbf{x})\quad...

A bit of polishing... girl-eigenvector to boy-eigenvector: "Of course I care. It's just that we have very different eigenvalues, and I...

Why did the girl-eigenvector and the boy-eigenvector split up? They found that they had very different eigenvalues. And they both...

No. The shape of a stress-strain graph doesn't depnd on the wire's diameter. So the breaking stress and strain are 'constants' for the...

Here's one way to look at it... For a given material, there is a unique maximum value of strain, ##\epsilon_{max}##, at which fracture...

Well (from what I've read), it depends. E.g. "A bluff charge is intended to intimidate, not to attack. A bluffing bear may run...

I ___________________________ @catedral3000, it’s worth addressing some problems with your answers to part a). From the first graph it...

The non-slipping condition is simply required to enable the cone to rotate around the vertical axis. Friction provides the centripetal...

That's a pity - I thought it [my Post #10 formulation] was quite good! How could it be improved? Yes - then the solution is nearly...

Possibly something like this... A solid right circular cone of uniform density has mass m, height h and a base of radius r. ‘V’ is the...

A line can't be perpendicular to a point. You probably meant to ask: "Aren't gravitational field lines always straight and directed...

I'll explain! In Post #24 you wrote: I looked at the link. The first (remarkable) sentence of the abstract is this: "The foremost...