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HNQ
2:53 AM
3
Q: Can a submerged object in a free falling fluid sink faster than falling?

OtheJaredI've been wondering about how sunken objects would behave if you could instantaneously flip their container with water. Like if you had a bucket filled with normal tap water and you dropped a ball in it. Then SOMEHOW you instantly flip the bucket over such that for just a moment, the water is sus...

 
 
1 hour later…
HNQ
3:54 AM
2
Q: Are all representations of a finite group unitary?

hhsomething69I am reading Zee's Group theory in a nutshell for physicists and came across the following theorem (Page 96): Unitary representations The all-important unitarity theorem states that finite groups have unitary representations, that is to say, $D^\dagger(g)D(g)=I$ for all $g$ and for all r...

 
 
17 hours later…
HNQ
8:56 PM
4
Q: How do rocks store information about Earth's magnetic field?

RyeWhen a particular rock is being formed in a rift (by the solidification of magma, which is composed of ferromagnetic materials), the rock "stores information" about the Earth's magnetic field at the time of its formaiton. My textbooks talk about the materials becoming "aligned with the magnetic...

 
 
2 hours later…
HNQ
10:58 PM
4
Q: What is the reason to believe that the laws of physics are same in all frames of reference?

Ajinkya NaikThe first postulate of Special Relativity is that Laws of Physics must be the same in all frames of reference i.e. invariant of coordinate transformations. I know this might be moot to ask but after reading a critique's paper on Special Relativity, I thought the question needs to be answered. Is ...

 

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