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nasu's latest activity
N
nasu
replied to the thread
Electric field & force due to charged insulating hemispherical shells
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I did not say that a hemisphere can repel itself. It does not follow from what I wrote. I said "each piece of charge feels the field of...
Wednesday, 11:05 PM
N
nasu
replied to the thread
Electric field & force due to charged insulating hemispherical shells
.
A hemispherical shell does not have a constant field, not even considering only the field near the outher surface. So, there is no...
Wednesday, 10:24 PM
N
nasu
replied to the thread
Electric field & force due to charged insulating hemispherical shells
.
You don't find the field of one hemisphere but of a sphere. As long as the two pieces "almost touch" the field is of a sphere. For a...
Wednesday, 10:09 PM
N
nasu
replied to the thread
Electric field & force due to charged insulating hemispherical shells
.
You can find the formula for the field by using Gauss's law and the spherical symmetry.
Wednesday, 6:36 PM
N
nasu
replied to the thread
Sound Wave Diagram Help
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If they are both dashed they are in phase. Half a period later the same point will be reached by two solid lines. The amplitude of the...
Monday, 11:04 AM
N
nasu
replied to the thread
Sound Wave Diagram Help
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Coherent means that the phase difference is constant. Any constant. Your drawing seem to assume a phase difference of 180 degrees.
Monday, 9:18 AM
N
nasu
replied to the thread
Sound Wave Diagram Help
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Are the speakers supposed to be out of phase?
Monday, 9:07 AM
N
nasu
replied to the thread
Power dissipated over 1 cycle of a AC source-free RLC series circuit?
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Did you learn about RMS values of voltage and current? (this is for the OP)
May 3, 2024
N
nasu
reacted to
Sidsid's post
in the thread
Experiment measuring the distance dependence of a suspended metal bolt from a magnet
with
Like
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You have all mentioned important problems, which have caused me to step back and review my set-up. One note, I meant that 'magnetic...
May 2, 2024
N
nasu
replied to the thread
Experiment measuring the distance dependence of a suspended metal bolt from a magnet
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You assume that the field is proportional to the current (or voltage). But this will be the case only if the point of interest is always...
May 1, 2024
N
nasu
reacted to
Ibix's post
in the thread
Significant figures doubt
with
Like
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I agree with you too. We need to get Brian Cox, Sean Carroll and Neil de Grasse Tyson to check this so we can say the question was...
May 1, 2024
N
nasu
replied to the thread
Help with Friction Forces: Box resting on a board on a frictionless surface
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What will be the accelerations of the two bodies if ##F=m_1\mu_s g##?
Apr 30, 2024
N
nasu
reacted to
kuruman's post
in the thread
Drag Forces and Terminal Velocity
with
Like
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I think that adherence to the sign convention is not the teacher's problem here but unrecognized self-contradiction is. Teacher says...
Apr 26, 2024
N
nasu
reacted to
zenterix's post
in the thread
Current in circular wire surrounding infinite solenoid in a circuit
with
Like
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I figured out what the issue is. The induced current I computed is correct. The system was calling the resistance in the circular wire...
Apr 26, 2024
N
nasu
reacted to
pbuk's post
in the thread
Two tourists and a bicycle - uniform motion
with
Like
.
Perhaps, but the solution (as hinted at by @haruspex and @Steve4Physics) is much more simple than set out above. We are not supposed to...
Apr 25, 2024
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