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#physics

280 posts142 participants19 posts today

#Vector #calculus in #Physics is actually a special case of multivariate analysis in #Statistics. A vector v of x is a measure of x's deviation from the origin, that is v = x - 0 with a direction. In statistics we look at x's deviation from its own mean instead, i.e. x - x^bar where x^bar is the mean of x. In vector calculus the dot product u dot v is really just the covariance of x and y assuming x^bar and y^bar are zero. #math #mathematics

#Physics Highly recommend this playlist on the historical development of QM: "The Dawn of Quantum Mechanics".

Gets reasonably technically/mathematically detailed though one doesn't need to understand those bits in depth to appreciate the overall narrative.

Even good, or particularly good, for those who already understand this stuff, as it's put together in a nice package, interesting presentation, and likely includes some historical tidbits not previously encountered.

youtube.com/playlist?list=PL_U

I got physics on the brain at the moment so here's a tidbit..

We all know time gets weird when you approach the speed of light.

The tidbit is time doesn't change for the person who is moving. Local time is always one second per second.

That doesn't mean when you get out of your spaceship it doesn't get weird it means your time doesn't change.

#physics
#relativity