SammyS's latest activity
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SammyS reacted to haruspex's post in the thread Is it possible for a vertical rod balancing on a table to lose contact by striking the top of the rod? with
Agree.
It is stated as frictionless, but it makes no difference anyway. -
SammyS reacted to mmfiizik's post in the thread Two-layer dielectric, four-capacitor model vs three-capacitor model with
Like.
Thank you all for explanations. I tried to prove this to myself by contradiction, but it might be an oversimplification. If we assume... -
SammyS reacted to Steve4Physics's post in the thread Two-layer dielectric, four-capacitor model vs three-capacitor model with Like.
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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SammyS reacted to Dale's post in the thread Undergrad Varying resistance readings depending on how I connect my meter with Agree.
The breadboard seems to add 0.4 ohms of resistance.
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SammyS reacted to PeroK's post in the thread Undergrad There are only finitely many primes with Like.
There are two slightly different versions of the Euclid proof. If we assume that we have all the finitely many prime numbers, then the...
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I'd forgotten this puzzled me in the past: whether there is a magnetic field from a current must depend on the frame of reference...
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SammyS reacted to Dale's post in the thread Undergrad Ampere-Maxwell law seems to contradict causality? with Like.
No. It just means that your assumption is wrong. Look, your assumption is basically that something happened which is so fast that...