Qwerty123uiop
This is a test...
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editElectrostatic self-energy of the object (II)
editI don't know if I'm responding on the discussion I've made (if I am, please, say it to me), but here's my problem:
We have
V = kq/r (Eq. 1) , dq = rho 4πr^2 dr (Eq. 2) , and dU = Vdq (Eq. 3).
If we integrate (Eq. 3) from 0 to r (we represent this integral with integral()), we calculate the electrostatic self-energy of the object:
U = integral(Vdq) (Eq. 4)
Putting in (Eq. 1) and (Eq. 2) into (Eq. 4), we obtain
U = integral((kq/r)(rho 4πr^2 dr)) , which simplifies to U = integral(kq rho 4πr dr).
The constants are k, q, rho and 4π, so we take them away from the integral and we finally arrive to
U = kq rho 4π (((r^2)/2) - ((0^2)/2)) = kq rho 4π (r^2)/2.
Putting rho = 3q/(4πr^3), we finally obtain
U = k (3/2) (q^2)/r , but the equation should be U = k (3/5) (q^2)/r.
What am I doing wrong? 47.60.54.205 (talk) 02:03, 13 May 2022 (UTC)
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Please help me out with some physics stuff
editHi, I see you're good at physics. May I ask for your help on the Geiger-Marsden experiments article?
Talk:Geiger-Marsden experiments
I want to know if I got my maths right with this one. I haven't done physics since high school, I'm rather rusty. I would much appreciate an expert's help. Kurzon (talk) 19:41, 18 June 2023 (UTC)
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September 2024
editThank you for your contributions. It seems that you may have added public domain content to one or more Wikipedia articles, such as George Westinghouse. You are welcome to import appropriate public domain content to articles, but in order to meet the Wikipedia guideline on plagiarism, such content must be fully attributed. This requires not only acknowledging the source, but acknowledging that the source is copied. There are several methods to do this described at Wikipedia:Plagiarism#Public-domain sources, including the usage of an attribution template. Please make sure that any public domain content you have already imported is fully attributed. Thank you. — Diannaa (talk) 20:06, 18 September 2024 (UTC)
- Hello Diannaa, Thank you for your message. I see that you already made a small change to the citation of the LOC information in the article on George Westinghouse: very nice. The page on attribution templates is most unenlightening. It is unclear from your message whether there is anything else to be done about these recent edits. If so, please send me a more specific suggestion. Qwerty123uiop (talk) 20:32, 18 September 2024 (UTC)
- In the future, please add attribution when copying from public domain sources: simply add the template
{{source-attribution}}
after your citation. I have done so for the above article. Please do this in the future so that our readers will be aware that you copied the prose rather than wrote it yourself, and that it's okay to copy verbatim. Thanks, — Diannaa (talk) 22:27, 18 September 2024 (UTC)- OK, thanks, that is clear. In this case the line reads, as you wrote, "Adapted from LOC..." because some additional items may be added to the LOC list. Qwerty123uiop (talk) 22:37, 18 September 2024 (UTC)
- In the future, please add attribution when copying from public domain sources: simply add the template
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