Recent content by daveed

That makes sense, I guess - they are taking rather long exposures, and Mars might just track across the image. In this case, does anyone have an idea of where I could look for such a dataset?

I was wondering if anyone here had experience using the image dataset of the Sloan Digital Sky Survey. Specifically, I want to find images of Mars from within their data. However, because they take one picture of the sky a night, and at a very small section of the sky, it's hard to predict...

Hi all, I looked through the reference library post, but didn't see anything about this. Is there a website that contains the relative locations of the sun, earth, and moon over time? moon phases aside - I would actually like to know the exact locations of the Earth and moon (in say...

So, the question is: Determine all finite groups that have at most three conjugacy classes I'm a little confused by how to start. Right now, we can say for sure that cyclic groups of order 1, 2, and 3 satisfy this criterion. Also, with Lagrange's Theorem and the counting formula(I'm using...

It's been a few days, and I still haven't made much headway on this. Our teacher gave us a hint, which was that we need to get it into the form (NM_x - MN_x)x + (NM_y - MN_y)y Which I can see equalling 0, by the definition given by HallsofIvy above, because N(xM_x + yM_y) - M(xM_x + yN_y)...

That's about where I stopped too... heh

I asked my teacher about that part, and she says that it implies the functions M and N are algebraic functions of degree n However, I don't know how to incorporate that into a proof(because such a strategy for finding an integrating factor wouldn't be true in general, so the being a polynomial...

Hey... So the question is as stated: Show that \frac{1} {M_x + N_y} , where M_x+N_y is not identically zero, is an integrating factor of the homogeneous equation M(x, y)dx+N(x, y)dy=0 of degree n. So I am not too sure where to go with this. I suppose what it's saying is, that I'm...

I understand that theory predicts a graviton- but my question is, does the quoted text sound kosher? a "graviton orbital"? What?

The physics section of the "art of problem solving" forum The link is here: http://www.artofproblemsolving.com/Forum/topic-64451.html Basically, the people on the forum are around high-school to college, with a few adults scattered here and there. We focus mainly on problem-solving(math...

Hey guys, I was reading on another forum when someone posted the following: I have no idea what to make of it As the posters here are much more qualified in the field of physics than I am, could someone please give me a sense of what the above says, or if it's even coherent? thanks...

those are two different things... you can use either, if you know what you're doing.

do you know archimede's principle? It states that the weight of the fluid displaced is the buoyant force felt by the object. For the first part- you do know what density means, do you not? For the second part- how much water is displaced?(The density of water is 1g/cm^3

Wouldn't the wind that comes from the fan depend on which way the fan blades tilted?

a smaller force acting on a smaller mass produces the same acceleration the Earth would stay in the same place...