cross-posted from: https://lemmy.ml/post/19504984
It's all relative
See https://mander.xyz/post/17123445 and in particular https://lemmy.blahaj.zone/comment/10334166.
BB84
joined 1 month ago
While it is true that space time dilation can cause red/blueshift, that is a distinct from the doppler effect which is the primary effect here.
(dilation plays only a small role: without time dilation our answer going from 700nm to 350nm would be 0.5c instead of the 0.6c calculated below)
One ton of TNT is 1E9 calories which is 4 gigajoules. So 0.2 petajoules should be only 50 kilotons of TNT?
chonk rose 😳
Kinetic energy or total energy? Assuming the rose weight 10 grams I get that 1.12PJ total energy, but only 0.23PJ is kinetic.
Image upload fails often as well.
Grey means no data?
Phonon Spectroscopy
As always, relevant Wikipedia links:
https://en.m.wikipedia.org/wiki/Al-Khwarizmi https://en.m.wikipedia.org/wiki/Donald_Knuth https://en.m.wikipedia.org/wiki/Algorithm
cross-posted from: https://hexbear.net/post/3062545
Important history
I saw a few math memes so I figure these are allowed here
And “choose”, of course.
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That is definitely not a correct expression for force. It doesn’t even have unit of force. Do better. smh