Recent content by BvU

Hi, See rules etc: explain (in words) what you are doing; make a sketch (Height versus time) of what happens. We are a bit reluctant to reverse engineer your writings, so you have to help us help you :cool: ##\ ##

:welcome: Look at the picture: Doesn't it seem strange that Check your math -- and is your calculator set up for radians or for degrees ? ##\ ##

No, the ##(5-1)!## gives you the number of circular permutations for the five balls and the ##\displaystyle{\frac 1 {2!2!} } ## corrects for the identicals. ( expression works for 1 yellow, 3 red, 3 blue: ##\displaystyle{\frac {(7-1)!}{3!3!}}=20## which matches the brute force result...

Why 4 ?

Hesitating to do that -- afraid of making things worse -- but probably the only way out. Funny to see that MDI child windows look as expected, but the parent window doesn't: formborderstyle of normal windows do follow Sizable/Fixed expectations; only the looks are wrong. Oh, well... [edit]...

Thanks for replying. But it's not that easy: Only one that gives a different picture is "None" (which does what it should do). ##\ ##

Embarrassed having to ask: My windows in VS 2022 (on W10) look like when I would like them to look like and I can't *&*&* find what caused it and how to get back Any suggestions where to look ? ##\ ##

Hi, Can you explain why this is allowed ? Can you explain why this is necessary ? Your calculation does not involve the relevant equation ... And your answer does not provide a current as a function of time, so yes, you are missing something ! ##\ ##

:welcome: Looks as if the exercise composer is a little bit sloppy. Can you post the complete exercise ? https://www.physicsforums.com/threads/homework-help-guidelines-for-students-and-helpers.686781/ ##\ ##

Yes

What I mean is a clear drawing and legible text. Like Dug up an old egyptology book but couldn't find . Physics book suggests ##F_res=0##. Maybe, maybe not. y components cancel, and then would be translated to $$F_{14,x}+F_{24,x}+F_{34,x}=0$$ in the drawing above. Give or take a minus...

Interesting hieroglyphs! Could you provide a transcript ? ##\ ##

:welcome:

Red circle: ##(x-\pi/2)^2+(y-999)^2=1000^2\ ## blue sine: ##y = \sin x\ ## https://www.wolframalpha.com/input?i=%28x-pi%2F2%29%5E2%2B%28y-999%29%5E2%3D1000%5E2+%26+y+%3D+sin%28x%29 ##\ ##

Just so we don't waste time: is it $$\dfrac{dy}{dx} + \ln (x y) = 6x$$ or is it $$\dfrac{dy}{dx} + (\ln x) y = 6x\ ?$$ ##\ ##