Room for Bml and John Rennie

ω doesn't even appear in the equation for the torque.

So you see how easy this is if we simply write down the vectors?

Then the shear stress is krθ/𝓁.

The errors in T and 𝓁 come from your measurement, and you have to judge how big they are. e.g. I would guess timings are only accurate to about ¹⁄₂ a second and lengths to about a millimetre.

So it's a bit misleading to say ψ² tells us the probability of the electron being at that position. It's more like telling us how much of the electron is at that position.

Decoherence is mathematically well defined, but the interpretation is not.

I don't know enough about it to comment.

I didn't understand it. A frame is always a coordinate system so I don't see any ambiguity.

Do you have it as a pdf? If so can you upload the pdf somewhere?