Questions Asked

peter_pan:
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 15 days ago
 No Medals Yet

peter_pan:
Wavefunction of two nucleons:
why is the wavefunction of two nucleons interacting via hadronic interaction antisimmetric?
(1)^(L+S+T)
 updated 2 months ago
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peter_pan:
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 2 months ago
 2 replies
 1 Medal

peter_pan:
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 2 months ago
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peter_pan:
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:
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:
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
 No Medals Yet

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

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

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

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

peter_pan:
What are input and output impedences?
As an example, how can I calculate the input and output impedences of an emitter follower?
…
 updated one year ago
 No Medals Yet

peter_pan:
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 one year ago
 16 replies
 4 Medals