Steve4Physics's latest activity

Thank you all for explanations. I tried to prove this to myself by contradiction, but it might be an oversimplification. If we assume...

Hi @tellmesomething. I understand what you mean - sorry for not picking it up sooner. I’ve edited what I said in Post #8 as it may be...

The initial net charge is non-zero. But when plate-3 is grounded, charge will flow between the system and ground. The final net charge...

The Post #1 diagram is misleading. It would be better to include an open switch in the earthwire and ask something like: "What are the...

I don’t think that’s correct – there will be discontinuities in charge-densities and field-strengths as you move left to right. To add...

I think you are right. The book solution implicitly assumes that the voltage at the bottom of slab 1 is constant across the width, which...

FWIW, on the right-hand side you are adding quantities with different dimensions: ##v## has dimensions ##LT^{-1}##, ## \frac {dv}{dt}##...

@NTesla, maybe this is one source of your difficulty... That's not entirely correct. The horizontal section of the chain is...

Do you mean the equations from your Post #1? I can see them. Here's a copy, though LaTeX rendering may be a problem:

Yes, that's a valid point.

@NTesla, the last part of the question on the screenshot is missing. So here’s what (I believe) it should say: "... At a certain...

Assuming that's not rhetorical... You can’t. But there’s a possibility that a 60° angle was accidentally omitted from the question -...

1.15mm is a bit thin to call a rope! A ‘cord’ might be a better term. Nylon is stretchy, but this won’t affect the answer to the...

That’s one way of thinking about it. But I’m not convinced that is the intended interpretation. The ionisation energy of a molybdenum...

This is (IMO) a badly written question for another reason. The final state of the atom is ambiguous. Is it: a) missing only an...