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Steve4Physics's latest activity
S
Steve4Physics
replied to the thread
Confused about interefence patterns
.
Make sure you have carefully read and thought about what the question is asking. For another mark, I'd guess that you are required to...
Yesterday, 2:14 PM
S
Steve4Physics
reacted to
Guillem_dlc's post
in the thread
Motor rotating at normal speed and then prevented from rotating
with
Like
.
Thank you very much! With this hint I was able to do the exercise and I got what it says.
Yesterday, 10:02 AM
S
Steve4Physics
replied to the thread
Motor rotating at normal speed and then prevented from rotating
.
When the motor is prevented from rotating, it acts as a simple resistor. When the motor is rotating, it acts as a simple resistor and...
Yesterday, 8:33 AM
S
Steve4Physics
replied to the thread
Confused about interefence patterns
.
Yes, I think the suggestion in post #8 is correct. Turning X upside down (i.e. a ##180^o## rotation about AB) effectively introduces a...
Sunday, 4:47 PM
S
Steve4Physics
replied to the thread
Confused about interefence patterns
.
We often explain interference of two EM waves by considering vector addition of the waves’ electric fields (say ##\vec {E_1}## and...
Sunday, 9:45 AM
S
Steve4Physics
replied to the thread
Two objects joined by a rectilinear cable rotating
.
The system's total moment of inertia would be ##I = \frac L{\omega} = \frac {10}6 \approx 1.67 kg~m^2##. This is smaller than the given...
Saturday, 6:51 AM
S
Steve4Physics
replied to the thread
Effect of temperature on surface tension
.
To quote from here...
Thursday, 8:35 AM
S
Steve4Physics
replied to the thread
Shape of equipotential surface in 3d
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Yes. That’s right. On a (2D) drawing for a charged sphere, we would show equipotential lines which would be circles. In real (3D) life...
May 29, 2024
S
Steve4Physics
replied to the thread
Shape of equipotential surface in 3d
.
Try a couple of easier questions first: 1) What shape are the equipotential surfaces around a uniformly charged sphere? 2) What shape...
May 29, 2024
S
Steve4Physics
replied to the thread
Shape of equipotential surface in 3d
.
Hi @Lochikilebor. Welcome to Physics Forums. The way it works here is that we help/direct/advise you so that you can work out the...
May 29, 2024
S
Steve4Physics
reacted to
JACKR's post
in the thread
A problem in this photoelectric effect experiment
with
Like
.
Thanks for pointing them out. Yeah, I managed parts (e) and (f); thank you!
May 29, 2024
S
Steve4Physics
reacted to
ergospherical's post
in the thread
Problem in understanding angular momentum of a rigid body
with
Like
.
@MatinSAR: this is a subtlety, but the answer is not too complicated. In brief, the angular momentum is measured with respect to the...
May 29, 2024
S
Steve4Physics
replied to the thread
A problem in this photoelectric effect experiment
.
Yes. The other typo's I can spot are also important: ________________________ "The switch is in position while radiation with...
May 29, 2024
S
Steve4Physics
reacted to
MatinSAR's post
in the thread
Problem in understanding angular momentum of a rigid body
with
Like
.
One of the answers from the second link that is somewhat logical: It's interesting that they didn't make this clear in their book. I...
May 28, 2024
S
Steve4Physics
replied to the thread
A problem in this photoelectric effect experiment
.
Because 334 Ω is the last value given for R (in part (b)) and the question tells you when R is changed. And, as far as I can see, you...
May 28, 2024
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