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• Today, 05:15 AM
Nice! -Dan
6 replies | 241 view(s)
• Yesterday, 06:18 PM
topsquark replied to a thread 80 degrees in Geometry and Trig
@tkhunny: The question about the LaTeX code failing was recently posted. The word "angle" automatically connects to a link which screws up the...
10 replies | 241 view(s)
• Yesterday, 03:38 AM
And the winner of the most psychic helper of the day goes to tkhunny. Good catch. -Dan
6 replies | 173 view(s)
• 01-17-2019, 01:03 AM
It would help to have some context. Can you please post the whole question? Specifically, what do the different variables represent. -Dan
1 replies | 235 view(s)
• 01-16-2019, 01:00 AM
Yes, you can approach it that way as well. So long as your result comes out to be "0" no matter what m is (what about approaching with a vertical...
4 replies | 375 view(s)
• 01-15-2019, 08:17 PM
This one just screams "polar coordinates" to me. Try subbing x =r~cos( \theta ) and y = r~sin( \theta ). Then you simply have a limit as r \to 0. ...
4 replies | 375 view(s)
• 01-15-2019, 08:08 PM
I knew that. Really, I did. I, um, was ... testing you! Yeah, I was testing your reading comprehension. Yeah, that's what I was doing. -Dan
15 replies | 612 view(s)
• 01-15-2019, 08:01 PM
When I see stuff like "i"s under a radical I go straight over to the exponential format. \sqrt{-16 i } = \sqrt{16} \cdot \sqrt{-i} = 2 \cdot...
20 replies | 881 view(s)
• 01-15-2019, 05:49 PM
Fractional exponents follow the same rules as integers. \left ( x^a \right ) ^b = x^{ab}. (This also works for exponents that are real or complex.)...
4 replies | 290 view(s)
• 01-15-2019, 05:44 PM
I hate to bring this up but am I the only one that has noted that the "cylinder" on top of the sphere isn't really a cylinder? The bottom of the...
15 replies | 612 view(s)
• 01-14-2019, 07:31 PM
My Dad used to work in the ER when he was putting himself through College. He wasn't in the medical field but they put him to work doing minor...
30 replies | 679 view(s)
• 01-14-2019, 07:27 PM
topsquark replied to a thread Force Vectors in Calculus
Congrats! Hey, if you are feeling up to it could you write out your solution? It might help someone else down the line. -Dan
6 replies | 312 view(s)
• 01-14-2019, 01:08 PM
Now me, I'm bilingual in English and Calculus. -Dan
23 replies | 769 view(s)
• 01-13-2019, 09:38 PM
It was all the accumulated detention periods he had to attend. -Dan
30 replies | 679 view(s)
• 01-13-2019, 09:37 PM
As it happens I had to teach myself most of what I knew about QFT. (Specifically the electro-weak sector.) I pretty much buried the room, including...
30 replies | 679 view(s)
• 01-13-2019, 08:18 PM
Go to a "flat-Earth" believer and make a large monetary bet that they can't find an edge. Then take the winnings and hire a professional engineer to...
23 replies | 769 view(s)
• 01-13-2019, 08:08 PM
You mostly have it. But I'd try this: (It's a bit more direct.): tan \left ( \dfrac{x}{2} - \dfrac{\pi}{2} \right ) = \sqrt{2} arctan \left =...
3 replies | 367 view(s)
• 01-13-2019, 02:46 PM
So I'm "the physicist" now? If you really must call me something other than Dan or topsquark then I'll let you know that I don't have a PhD, but I...
30 replies | 679 view(s)
• 01-12-2019, 12:12 AM
I've look at it again and I'll give it another shot. What the article seems to talk about when it says "inversion of spatial properties" is to...
3 replies | 270 view(s)
• 01-12-2019, 12:03 AM
You? With a rosary? It would catch fire when you touched it! -Dan
30 replies | 679 view(s)
• 01-11-2019, 04:31 PM
Bumpity bumplty bumpity! Wheeeee! :mrgreen: -Dan
7 replies | 560 view(s)
• 01-11-2019, 04:29 PM
The electric field in between the capacitor plates only has a vertical component. Thus the proton is not accelerated in the horizontal direction...
7 replies | 560 view(s)
• 01-10-2019, 06:37 PM
That's a neat article. Thanks for sharing. Much of what I'm going to talk about here comes from Weinberg's "The Quantum Theory of Fields". If...
3 replies | 270 view(s)
• 01-10-2019, 02:02 AM
What is this? Pick on Dan day? :confused: The more information you need to process a signal the more you need something to focus a signal for...
2 replies | 281 view(s)
• 01-10-2019, 01:50 AM
There's not much to say, really. If the acceleration is not constant then we can simply call it something like a(t) and use Calculus from there. I...
5 replies | 269 view(s)
• 01-09-2019, 11:45 PM
Well thank you! I'm pleased to be here, though I don't get much chance to do my Physics-ing here. ;) -Dan
5 replies | 269 view(s)
• 01-09-2019, 10:09 PM
topsquark replied to a thread Equation of free fall in Calculus
Most of the time in Introductory Physics we use the constant acceleration equations, even if it's a Calculus based class. The displacement equation...
14 replies | 380 view(s)
• 01-09-2019, 04:04 PM
topsquark replied to a thread Equation of free fall in Calculus
From a Physicist's perspective: From the given equation what is a? Do you know an equation for speed in terms of the acceleration and time? -Dan
14 replies | 380 view(s)
• 01-07-2019, 09:40 PM
Nice! :cool: -Dan
10 replies | 392 view(s)
• 01-05-2019, 11:32 PM
The 700 is a constant in the formula for P(x). So in finding the difference P(16) - P(4) the constant will cancel itself out. For example, (A +...
16 replies | 445 view(s)
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Hello. My name is Inigo Montoya. You killed my father. Prepare to die.
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