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HNQ
2:37 AM
5
Q: On the interpretation of Feynman diagrams

S.FarrI am currently trying to find out about what exactly Feynman diagrams are, and up until now I have mainly used the lecture notes 'Mathematical ideas and notions of quantum field theory' by Etingof. In this notes, Feynman diagrams are merely used to easier calculate asymptotic series expansions fo...

 
 
1 hour later…
HNQ
3:53 AM
3
Q: Does Zeno's Paradox hold the simplest key to explain the widely-held continuous spacetime belief in physics?

Double KnotRichard Feynman in this 60's public lecture claimed it's easy to prove "physical space cannot be discrete automata", otherwise it will soon violate existing physical observations towards the end of this lecture. But he didn't mention any proof or explanation there. I thought about this further an...

 
 
6 hours later…
HNQ
9:49 AM
1
Q: Radiation in particle accelerators

Milan PaulI was reading about particle accelerators in Wikipedia and I came across this. Depending on the energy and the particle being accelerated, circular accelerators suffer a disadvantage in that the particles emit synchrotron radiation. Why don't linear accelerators have this disadvantage. The part...

 
 
3 hours later…
HNQ
12:21 PM
1
Q: If we were able to prove that the Universe is infinite, wouldn't that statistically prove that there is no other forms of life?

Omar AdelI want to begin my explanation using abstract mathematical explanation to repetition possibility by taking independent samples Xn from some continuous probability distribution: https://math.stackexchange.com/q/1739927/ If we applied this same principle and its conclusion and assumed that the univ...

 
 
5 hours later…
HNQ
5:00 PM
1
Q: Why can't Earth core melt whole planet?

Dean Moxley Earth core temperature is range between 4,400° Celsius (7,952° Fahrenheit) to about 6,000° Celsius (10,800° Fahrenheit). Source Why can't Earth core melt whole planet? In other words, what stopping Earth to be melted down to its core?

 
HNQ
5:51 PM
6
Q: When vibrating a string, how exactly is the vibration inverted to create an identical wave traveling in the opposite direction?

Buster BieI am currently trying to understand standing waves. The key to the phenomenon is that: $$A\sin(kx+\omega t) + A\sin(kx-\omega t)=2A\sin(kx)\cos(\omega t)$$ The shape of $2A\sin(kx)\cos(\omega t)$ is constant, as only the amplitude changes with time due to the $\cos(\omega t)$. This creates the fa...

 

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