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10h
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14h
awarded  Nice Answer
1d
comment Upper division physics lab — Project ideas
"As an experimentalist, I am very excited to be taking my first upper division physics lab next semester! The course covers basic electronics" Design, build, and demonstrate an analog computer that solves some system's differential equation. I recommended this to a couple of students this semester and, from what feedback I've received, it was the project to which others were to be compared. Analog computing is a nearly forgotten practice and just might be unique enough to stand out among the competition. Here's an example: youtube.com/watch?v=qt6RVrmvh-o
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comment When we catch a falling object, where does its kinetic energy go?
"where does its kinetic energy go?" into other forms of energy (essentially, by definition). Power is, essentially, the flow of energy of one form to another. Of course, these other forms of energy may be obvious or not.
1d
answered Can velocity be an undefined quantity?
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answered Why isn't length contraction permanent even though time dilation is?
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comment Does spacetime have a “mass” value? or What is “Spacetime” made out of?
Just a thought: if spacetime is a fundamental entity, it's not 'made of anything', it simply is. Another thought: it is the geometry (metric) of space that is expanding. I don't know that it is profitable to think of space being created or "uncreated". A final thought: gravity doesn't manipulate spacetime - gravity is the curvature of the spacetime. It is mass-energy that curves spacetime (and spacetime that tells matter how to move etc.).
Dec
17
comment What is the point of the reduced Planck's constant $\hbar$ (h-bar)? - Why don't we just have Planck's Constant $h$?
So we can write, e.g, $E = h\nu = \hbar \omega$ instead of $E = h \nu = \frac{h}{2\pi}\omega$
Dec
16
comment Why should we believe in clock hypothesis?
This question appears to be off-topic because the OP evidently is interested in a debate, not an answer to a specific conceptional question.
Dec
16
answered Capacitor/Inductor Resonance
Dec
16
comment How do we know that the Fourier transform of space is momentum?
@P.A.M, I don't understand your question. What do you mean by "how" and "what" makes it clearly understood? Would the fact that the spatial Fourier transform underlies almost all image processing give one reason to believe that it is well understood? See, for example, cs.auckland.ac.nz/courses/compsci773s1c/lectures/…
Dec
15
answered How do we know that the Fourier transform of space is momentum?
Dec
15
revised What is a watt?
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Dec
15
revised What is a watt?
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Dec
15
answered What is a watt?
Dec
15
awarded  Talkative
Dec
15
answered Can a quantum field be understood as a superposition of all particles' wave functions?
Dec
14
revised How do you define the resonance frequency of a forced damped oscillator?
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Dec
14
revised How do you define the resonance frequency of a forced damped oscillator?
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Dec
14
revised How do you define the resonance frequency of a forced damped oscillator?
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