Gavran's latest activity
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GGavran replied to the thread Graduate Does a moving particle count as a wave?."While waves are ubiquitous features of physical systems, no single definition adequately describes the topic." (from Wikipedia)
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GGavran reacted to Charles Link's post in the thread Undergrad Finding the minimum distance between two curves with
Informative.
Note: @Gavran 's method (post 15 above) needs a second power form to take the discriminant. @pasmith 's method works in the general... -
GGavran reacted to Lnewqban's post in the thread Simple Thermodynamics question: Temperature of water in a cup after adding cooler water to it with
Like.
Since there is no energy loss to the environment in this case, the initial thermal energy of each mass of liquid becomes the final... -
GGavran reacted to WWGD's post in the thread High School Abel Prize awarded, 2026, to Gerd Faltings with Informative.
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GGavran replied to the thread Solve the given second order differential equation.Clearly, the equation ## 4x^5u''+12x^2u'-4u=0 ## is not a Cauchy–Euler equation, and it cannot be solved by the standard method, which...
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GGavran reacted to Charles Link's post in the thread Undergrad Finding the minimum distance between two curves with Like.
I would like to give a big thank you to @anuttarasammyak , @pasmith , @Gavran , and @DaveE for their inputs to this thread. I really...
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GGavran replied to the thread Undergrad Finding the minimum distance between two curves.Analytical solution by using Vieta's substitution: ## \begin{align} &a^3-9a^2+21a-3=0\nonumber\\...
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GGavran reacted to Charles Link's post in the thread Undergrad Finding the minimum distance between two curves with Like.
@Gavran Very good=Excellent. :) You have an interesting approach where you translated the first curve by ## (a,b) ## until it made...
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GGavran replied to the thread Undergrad Finding the minimum distance between two curves.Let ## (x_1,y_1) ## be a point on the curve ## f(x)=4-x^2 ##, which is the closest point on the curve ## f(x) ## to the curve ##...
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GGavran reacted to Charles Link's post in the thread Undergrad Finding the minimum distance between two curves with Like.
The other day a friend of mine gave me the above problem which I found rather interesting. I was able to get a numerical solution...
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GGavran replied to the thread Three phase transformer phase angle and group.There are Figures 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, and 19 in the same text...
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GGavran reacted to Guineafowl's post in the thread Three phase transformer phase angle and group with Like.
Ok, there must be some rule I’m missing, after which the penny will drop. Forgive my stupidity. How is the X1 (or U) junction defined...
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GGavran replied to the thread Three phase transformer phase angle and group.It depends on how X1, X2, and X3 are interconnected with W4, W5, and W6. See again Figure 4-D7 (the third image on the right).
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GGavran replied to the thread Three phase transformer phase angle and group.Yes, you are right. That means X1 lags H1 by 30° in group 1, and X1 lags H1 by 330° in group 11. Both examples are correct. See Figure...
