Recent content by daveed

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    Using Sloan Digital Sky Survey to find Planets

    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?
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    Using Sloan Digital Sky Survey to find Planets

    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...
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    Relative locations of earth, sun, moon

    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...
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    [Algebra] Conjugacy classes of Finite Groups

    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...
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    Showing Integration Factor of Homogeneous Equation of Degree n

    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)...
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    Showing Integration Factor of Homogeneous Equation of Degree n

    That's about where I stopped too... heh
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    Showing Integration Factor of Homogeneous Equation of Degree n

    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...
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    Showing Integration Factor of Homogeneous Equation of Degree n

    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...
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    Gravity and how it works?

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

    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...
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    Gravity and how it works?

    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...
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    What is the Velocity of a Person at the Equator?

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

    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
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    Right hand rule in vector cross product

    Wouldn't the wind that comes from the fan depend on which way the fan blades tilted?
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    Earth Flying Away from Sun: What Does the Math Say?

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