Questions Answered

hchairesmd:
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Now, consider a particle shot out of a cannon at some angle experiencing a force Ff, due to air resistance. Draw the force vectors for the o…
 updated 5 months ago
 2 replies
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peter_pan:
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Ball thrown over a rotating platform.
 updated 5 months 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 6 months ago
 1 reply
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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 9 months ago
 4 replies
 1 Medal

terri1956:
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A spring with spring constant .7 cm/dyne has a force of 42 dynes applied to it (stretching it). How much does the spring stretch?
 updated 9 months ago
 2 replies
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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 11 months ago
 2 replies
 1 Medal

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 2 years 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 2 years 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 2 years ago
 4 replies
 1 Medal

peter_pan:
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STATISTICAL MECHANICS PROBLEM (CLASSICAL CANONICAL ENSEMBLE):
 updated 2 years 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

rocker8007:
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can someone show how to find the coordinates of center of mass of a disk using double integrals?
 updated 2 years ago
 3 replies
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Ruchi.:
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find centre of mass of a hemisphere?
 updated 2 years ago
 39 replies
 3 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

DLS:
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Can a body have increasing velocity with decreasing acceleration?
 updated 2 years ago
 30 replies
 10 Medals

Amberley:
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In what direction does current flow in a DC circuit?
 updated 2 years ago
 7 replies
 3 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
 11 replies
 2 Medals

mayank.jain:
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what is newton's inertial frame of reference?
 updated 2 years ago
 7 replies
 3 Medals

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