All Questions
6
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Derivation of Energy-Mass Equivalence: Total energy = kinetic energy $+ mc^2$ [duplicate]
How do you derive the energy mass equivalence just from special relativity? To be exact, in this video, https://www.youtube.com/watch?v=KZ8G4VKoSpQ, at around 23 minutes in, he claims that the total ...
- 480
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votes
1
answer
52
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Kinetic energy with respect to center of mass frame (COM) [closed]
Let there be an object having some chemicals in it. It starts moving with a uniform velocity $v$ and a chemical reaction starts happening. In this case, which of the following statement/s is/are ...
- 446
2
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2
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Can't wrap my head around the energy formula being half of mass times velocity squared [duplicate]
I'm trying to understand the "Why" of this equation but can't make sense of it, my intuition breaks down.
When I think intuitively of energy, I think of "How powerful the impact will be ...
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1
vote
1
answer
126
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Why momenergy has magnitude equal to the mass?
The mom-energy of a particle is a 4-vector: Its magnitude is proportional to its mass, it points in the direction of the particle's spacetime displacement, and it is reckoned using the proper time for ...
user307064
0
votes
1
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Energy and momentum
Does a muon or an electron with the same energy have the higher momentum?
According to $E^2=m^2+p^2$ if you increase the restmass, the momentum must decrease.
But if we look at a nonrelativistic case:...
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2
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Does a rotating object have more inertia, mass and gravitational pull?
When an object is rotating on an axis, it has stored rotational energy in it. Since energy and mass are related, does this stored rotation increase the mass of the object? And if so, will it be harder ...
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