# All Questions

136,346 questions
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### Thermal Equilibrium in bucket water with Al piece

Sorry in advance for the poorly formulated title. I am currently going through some assigments in Phyics and came across this one: Question: The heat capacity of a bucket is 1200 J/K and contains 2,...
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### Why is $\frac{du}{d\phi} = \frac{1}{D \cdot tan(\alpha)}$?

I've started reading this paper where it describes light trajectories on a Schwarzschild spacetime and stumbled upon the following formula: $$\frac{du}{d\phi} = \frac{1}{D \cdot tan(\alpha)}$$ ...
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### Can water be made more violet?

Water is intrinsically blue because of molecular vibrations. The topic is covered here: Only sea water appears blue in color, why this is not happening in river water? And here, which I post ...
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### Why do 2 charged conductors gain same potential when connected via wire

Why do 2 charged conductors gain same potential when they are connected via a wire.Can somebody also give a mathematical proof of it?
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### Potential flow around a sphere [on hold]

I have a problem understanding a example of the book Fluid Mechanis by Landau, 2nd edition, Chapter 1. Ideal fluid- Potential flow, page 22. I need intermediate steps of the problem, I do not ...
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### Could the Universe have a finite number of states?

I think most people would say the Universe is infinite, and the number of ways of arranging infinite particles in infinite space is infinite. But we know the "visible" Universe is finite, there is a ...
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### Do electrons contribute to the overall specific heat capacity?

Do electrons contribute to the overall specific heat capacity? Please explain why and why not. I researched for a bit and most of them said mostly phonons contribute to the specific heat but never ...
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### Formula manipulation

What is the potential energy of a metric ton (1000 kilograms), 3 meters above Earth's surface (at sea level), expressed in Kilowatt Hours? Assume that the mass will end travel when it contacts Earth. ...
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### Can someone explain the $ttH$ Coupling?

IS the $ttH$ an actual particle? If so, how can it form? I though the life of the top quark was way to short to form a particle. If it is not a particle, what is meant by coupling.
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### Can humans detect the original gravitational waves?

How far is the universe's original gravitational wave propagation?
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### If not the conjunction moon, then what? [on hold]

It was either 2017 or 2018, I don't remember the season, I didn't really think much about it, but I was driving in the Finger Lake regions of NY, Cayuga lake to be exact, It was still dark out, I left ...
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### Young's Double Slit, phase difference and path difference

To produce an interference pattern, the light sources must be coherent right? Coherent by definition means constant phase difference between waves of the same frequency so that means waves can be ...
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### Impulse on a Gyroscope

I've been studying gyroscopes, and I understand why a fast spinning gyroscope doesn't fall. However, I don't understand why a slow spinning gyroscope does fall, or why a large enough impulse to a fast ...

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