It was prompted by this: https://www.youtube.com/watch?v=fHG7qVNvR7w "Magnetic forces do no work" is only correct if you deal with individual point charges and apply the Lorentz force law. I'll be discussing that and pointing out that most realistic magnetic forces DO do work, because they are dipoles acting on dipoles. "Magnetic forces do no work" is an example of what I was talking about in my comment over on Sigma Game about "Gamma Physics." I'll certainly promote the videos as best I can, including with a post, here.
I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impress’d thereon.
II. The alteration of motion is ever proportional to the motive force impress’d; and is made in the direction of the right line in which that force is impress’d.
So the longevity of sub-atomic motions testifies to enormous power reserves, and hence the difficulties in safely harnessing nuclear energy (and the impressive effects of nuclear weapons)?
Power isn't needed to maintain motion, only to change it. While there is a great deal of energy stored in an atom, that energy is not dissipated as the atomic motion continues.
Don't orbits require changes of momentum, acceleration at a tangent?
Where does the energy come from to effect that acceleration?
When a force acts at a right angle to velocity, as in uniform circular motion, it does no work, and requires no energy.
Really?
So a force is an enrgy projection that moves things but does no work?
That seems ... counter-intuitive.
Absolutely. And it's also going to be the topic of my initial AetherRant when I start streaming this summer.
I hope you will supply us with links well prior. Would not want to miss that.
It was prompted by this: https://www.youtube.com/watch?v=fHG7qVNvR7w "Magnetic forces do no work" is only correct if you deal with individual point charges and apply the Lorentz force law. I'll be discussing that and pointing out that most realistic magnetic forces DO do work, because they are dipoles acting on dipoles. "Magnetic forces do no work" is an example of what I was talking about in my comment over on Sigma Game about "Gamma Physics." I'll certainly promote the videos as best I can, including with a post, here.
Yes, I caught that exchange there.
I appreciate that the world is "more strange than we CAN imagine" but I still want to try and make sense of it.
TOTALLY CRAZY! Hiding away all those years- invisible lines of force
"Permanent magnets have their properties because of many such microscopic current loops within their atomic structure"
Those microscopic "current loops" are electrons on the move. Why do they move? Does anyone know?
great stuff. Thanks.
Why do they move? That's a good question that doesn't have a really good answer. The movement is inferred from the existence of the magnetic moment.
Nothing moves unless it is acted upon?
I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impress’d thereon.
II. The alteration of motion is ever proportional to the motive force impress’d; and is made in the direction of the right line in which that force is impress’d.
Newton's first two laws.
So the longevity of sub-atomic motions testifies to enormous power reserves, and hence the difficulties in safely harnessing nuclear energy (and the impressive effects of nuclear weapons)?
Power isn't needed to maintain motion, only to change it. While there is a great deal of energy stored in an atom, that energy is not dissipated as the atomic motion continues.