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vela's latest activity
vela
replied to the thread
Final Charge of a Capacitor in a Circuit with Capacitors and Resistors
.
I know you already solved the problem, but I thought I'd point out the reasons why what you tried didn't work. The equation you are...
Mar 9, 2024
vela
replied to the thread
Thermodynamics and harmonic motion
.
For example, I would interpret "##P(V_x)## and ##V_x## are ##P/V##" to mean ##P(V_x)=V_x=P/V##, which doesn't make sense.
Mar 4, 2024
vela
replied to the thread
Thermodynamics and harmonic motion
.
I don't understand what this means.
Mar 4, 2024
vela
replied to the thread
Solve for all angles x: cos(2x) + cos(x) = 0, where 0<x<2pi
.
While you can certainly do that, why would you want to?
Mar 3, 2024
vela
replied to the thread
Solve for all angles x: cos(2x) + cos(x) = 0, where 0<x<2pi
.
There seems to be a mismatch in what you think you need to know and what the book's authors expect you to know. Presumably, if you're...
Mar 3, 2024
vela
replied to the thread
Elastic Potential Energy - Positive or Negative?
.
In the formula, $$\Delta PE = -\int_{x_0}^x F_{\rm s}(x)\,dx,$$ the force ##F_{\rm s}## is the force exerted by the spring. If you...
Mar 3, 2024
vela
reacted to
DrClaude's post
in the thread
LaTeX
Times New Roman for a portion of a ##\rm{\LaTeX}## document
with
Informative
.
Have a look at https://www.overleaf.com/learn/latex/Font_typefaces
Mar 3, 2024
vela
replied to the thread
Fourier Transform - Solutions Error?
.
I found the problem in my copy of the second edition of Zittili. It looks like they dropped the constant factor in front, but doing so...
Mar 3, 2024
vela
replied to the thread
How does one calculate the number of photons striking a surface per second?
.
Try some limiting cases. For example, if the paper gets really small, say, ##x \to 0##, does your answer give the result you'd expect...
Feb 25, 2024
vela
replied to the thread
I
Why is anyone looking for a graviton/force mediator if it's so widely accepted that that gravity is not a force, but physical curvature?
.
I'd say you're putting too much stock in the word force. https://www.wtamu.edu/~cbaird/sq/2022/08/05/why-is-gravity-not-a-real-force/
Feb 24, 2024
vela
reacted to
kuruman's post
in the thread
Wave function of infinite potential well
with
Like
.
Actually, the factor of ##2^2## is in confusing a symmetric well ##-a\leq x \leq a## with a symmetric well ##-\frac{a}{2}\leq x \leq...
Feb 23, 2024
vela
replied to the thread
Wave function of infinite potential well
.
This is clearly wrong. You can't have a probability greater than 1. You didn't normalize the wave function correctly. If you did, you...
Feb 23, 2024
vela
replied to the thread
Wave function of infinite potential well
.
You're confusing the expression with ##\hbar## with the one that uses ##h##. It's either $$E_n = \frac{p_n^2}{2m} =\frac{(\hbar...
Feb 23, 2024
vela
reacted to
Mark44's post
in the thread
B
What went wrong with (-x)^2=x^2?
with
Like
.
Since the thread has become filled with less than helpful information (I'm being charitable), I am closing it.
Feb 10, 2024
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