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HNQ
8:25 AM
1
Q: Mass travelling with constant speed in a circle

restless_resistorImagine a 2D circle has a point mass traveling along its circumference with constant speed. The only force experienced is centripetal. However, if we take the 2D plane the circle sits on and rotate it such that it appears 1 dimensional to us, the circle becomes a line. The mass traveling along th...

 
 
1 hour later…
HNQ
9:41 AM
1
Q: Is there angular momentum conservation in models like the Ising model?

Felipe DilhoIn Quantum Mechanics conservation laws are fundamental, I was thinking about spin altering models of interaction such as the Ising Model and realized that it isn't at all clear how angular momentum conservation occurs in such a situation. If there is spin flipping occurring where does the contrar...

 
 
3 hours later…
HNQ
12:14 PM
1
Q: How did a spark generate electromagnetic fields that radiate to places?

SnoopyKidIn the video and pictures below, this guy is trying to replicate Hertz's experiment to generate electromagnetic fields from a dipole antenna. How did a spark generate electromagnetic fields? I thought it is the capacitors that generated the electromagnetic fields. https://www.youtube.com/watch?v=...

 
 
8 hours later…
HNQ
8:15 PM
1
Q: At what distance can I assume peculiar velocity is negligible compared to expansion velocity, to use Hubble's law?

Hossam DahshanI am working on a high school physics assignment and am trying to figure out a method to determine if the star is a giant or main sequence from its spectral and photometric data (from SDSS). I picked two stars of the same spectral class K1 a giant and a dwarf, and to compare their flux graphs I n...

 

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