Questions Asked

peter_pan:
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Ball thrown over a rotating platform.
 updated 29 days ago
 32 replies
 1 Medal

peter_pan:
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Collision of a ball with the ground.
1) Suppose you have a ball and you let it fall from a height h1. It will acquire a final velocity, say …
 updated one month ago
 1 reply
 No Medals Yet

peter_pan:
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Centrifugal force.
Suppose you have a rock on a rotating asteroid. Suppose the asteroid rotates so fast that the rock is lifted from the su…
 updated 5 months ago
 4 replies
 1 Medal

peter_pan:
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Can somebody explain to me how the mass to luminosity ratio for galaxies has to do with dark matter please? Or at least give me some referen…
 updated 5 months ago
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peter_pan:
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Wavefunction of two nucleons:
why is the wavefunction of two nucleons interacting via hadronic interaction antisimmetric?
(1)^(L+S+T)
 updated 7 months ago
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peter_pan:
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space translation invariance in quantum mechanics
if \psi is the wave function of a 1D system is it equivalent to say that translation invar…
 updated 7 months ago
 2 replies
 1 Medal

peter_pan:
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Question about groups and representations for physics:
does it make any sense saying that "SO2 is a representation of U1 carried by the vect…
 updated 8 months ago
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peter_pan:
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Can someone tell me why, when I connect a thermocouple to an opamp, the comparator circuit I obtain can not work? I know that this is due t…
 updated one year ago
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peter_pan:
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Hi everybody! I don't understand the output voltage of a non inverting ideal integrator! I attach a picture of the circuit and the relation …
 updated one year ago
 1 reply
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peter_pan:
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Quantum Mechanics (but the question is about calculus): I was studying the proof of the conservation of ∫ψ²d³r (ψ is the wave function) bu…
 updated one year ago
 1 reply
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peter_pan:
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Quantum Mechanics (the very beginning): I was studying the proof of the conservation of ∫ψ²d³r (ψ is the wave function) but I don't unders…
 updated one year ago
 4 replies
 1 Medal

peter_pan:
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STATISTICAL MECHANICS PROBLEM (CLASSICAL CANONICAL ENSEMBLE):
 updated one year ago
 2 replies
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peter_pan:
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Hi! I have a question about the following circuits A and B!
 updated 2 years ago
 8 replies
 2 Medals

peter_pan:
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Consider a pn junction. Why does the depletion layer become bigger when you reverse bias the junction?
 updated 2 years ago
 3 replies
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peter_pan:
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Consider a pn junction. Why does the depletion layer become bigger when you reverse bias the junction?
 updated 2 years ago
 9 replies
 2 Medals

peter_pan:
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How can I calculate the output impedance of an emitter follower and of a transformer starting from the definition? (please include details a…
 updated 2 years ago
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peter_pan:
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Is the Lagrangian function invariant under coordinate transformations? If so, where can I find a proof?
…
 updated 2 years ago
 11 replies
 2 Medals

peter_pan:
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Is the Lagrangian function invariant under coordinate transformations? If so, where can I find a proof?
 updated 2 years ago
 1 reply
 No Medals Yet

peter_pan:
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What are input and output impedences?
As an example, how can I calculate the input and output impedences of an emitter follower?
…
 updated 2 years ago
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peter_pan:
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How can I calculate the output impedance of an emitter follower (see the last post for details) and of a transformer? How matching impedance…
 updated 2 years ago
 16 replies
 4 Medals