Steve4Physics's latest activity
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SSteve4Physics replied to the thread Two-layer dielectric, four-capacitor model vs three-capacitor model.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...
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SSteve4Physics reacted to mjc123's post in the thread Two-layer dielectric, four-capacitor model vs three-capacitor model with
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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... -
SSteve4Physics replied to the thread Chain falling out of a horizontal tube onto a table.FWIW, on the right-hand side you are adding quantities with different dimensions: ##v## has dimensions ##LT^{-1}##, ## \frac {dv}{dt}##...
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SSteve4Physics replied to the thread Chain falling out of a horizontal tube onto a table.@NTesla, maybe this is one source of your difficulty... That's not entirely correct. The horizontal section of the chain is...
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SSteve4Physics replied to the thread Chain falling out of a horizontal tube onto a table.Do you mean the equations from your Post #1? I can see them. Here's a copy, though LaTeX rendering may be a problem:
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SSteve4Physics reacted to NTesla's post in the thread Chain falling out of a horizontal tube onto a table with
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Yes, that's a valid point. -
SSteve4Physics replied to the thread Chain falling out of a horizontal tube onto a table.@NTesla, the last part of the question on the screenshot is missing. So here’s what (I believe) it should say: "... At a certain...
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SSteve4Physics replied to the thread Speed of moth related to Doppler Effect.Assuming that's not rhetorical... You can’t. But there’s a possibility that a 60° angle was accidentally omitted from the question -...
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SSteve4Physics replied to the thread Struggling to make relation between elastic force and height.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...
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SSteve4Physics replied to the thread Confusion on sign convention in X-ray problems.That’s one way of thinking about it. But I’m not convinced that is the intended interpretation. The ionisation energy of a molybdenum...
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SSteve4Physics replied to the thread Confusion on sign convention in X-ray problems.This is (IMO) a badly written question for another reason. The final state of the atom is ambiguous. Is it: a) missing only an...
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SSteve4Physics replied to the thread Ice cube in water: entropy calculation (Calorimetry).Here’s a strategy to find the final state: 1) Calculate the amount of energy (A) needed to warm the ice to 0 deg.C. 2) Calculate the...
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SSteve4Physics reacted to palaphys's post in the thread Flux through a ring due to two charges with
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This post makes everything clear. Very high quality. All my doubts on this question got cleared! for a) I will take the direction of... -
SSteve4Physics replied to the thread Flux through a ring due to two charges.@palaphys, for an intuition, it helps to visualise flux lines. In the following diagram, the magnitude of the flux through the loop due...
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SSteve4Physics reacted to palaphys's post in the thread Flux through a ring due to two charges with
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1.##\frac{q}{\epsilon_0}## 2. ##\frac{-q}{\epsilon_0}## 3a)0 b)0





