mcastillo356's latest activity
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mcastillo356 posted the thread High School Need tips to understand Relativistic Energy in Special Relativity in Special and General Relativity.As in classic mechanics, we will define kinetic energy as the work done by the net force in accelerating a particle from rest to some... -
mcastillo356 reacted to kuruman's post in the thread Member and Mentor Appreciation Thread with
Like.
It's the end of the year and once again I wish to thank the mentors and admins for their stedfast commitment to the PF cause and for... -
mcastillo356 reacted to PeroK's post in the thread High School How does this derivative work? And why the speed of light remains? with
Informative.
Note that you can avoid the differentiation, by expressing ##v## as a function of ##p##: $$p = \gamma mv \implies v = \frac p {\sqrt{m^2... -
mcastillo356 replied to the thread High School How does this derivative work? And why the speed of light remains?.Understood inmediatly. Thanks Forum.
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mcastillo356 reacted to GlitchedGluon's post in the thread High School How does this derivative work? And why the speed of light remains? with Like.
If you take the derivative of that, m just "gets out" because it is constant: $$dp =m \, \, d...
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mcastillo356 replied to the thread High School How does this derivative work? And why the speed of light remains?.Let me think it over again. Your reasoning is perfect. I must be wrong somewhere, but still the change of variable in ##R-10## keeps me...
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mcastillo356 reacted to GlitchedGluon's post in the thread High School How does this derivative work? And why the speed of light remains? with Informative.
But the mass does not dissapear, you have it right there in your expression for K. c is the speed of light, it is a constant.
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mcastillo356 replied to the thread High School How does this derivative work? And why the speed of light remains?.Why in the change of variable from ##p## to ##v## vanishes ##m##. And which is the behavior of ##c##: is this last an invariant of the...
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mcastillo356 posted the thread High School How does this derivative work? And why the speed of light remains? in Calculus.Relativistic Momentum, Mass, and Energy Momentum and mass (...), the classic equations for conserving momentum and energy are not...
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mcastillo356 replied to the thread Merry Christmas.Merry Christmas from Spain.
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mcastillo356 reacted to neilparker62's post in the thread Member and Mentor Appreciation Thread with Like.
@PeroK . Stop complaining about AI - you're better by far!
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mcastillo356 replied to the thread Member and Mentor Appreciation Thread.berkeman, pasmith, Mark44,.. So many
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mcastillo356 replied to the thread Member and Mentor Appreciation Thread.Thanks, @pervect ,@PeterDonis
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mcastillo356 reacted to FactChecker's post in the thread High School Am I understanding the concept of proper frame of reference? with
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Regardless of the wording of the definition given in the Wikipedia article, I believe that the term "proper reference frame" has been... -
mcastillo356 reacted to Ibix's post in the thread High School Am I understanding the concept of proper frame of reference? with Like.
Note that the English meaning of "proper" has drifted over time to mean "correct". In this context, though, it's being used in an older...