Coordinate Definition and 910 Threads

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  1. denian

    Coordinate Geometry: Triangle Vertices & Point P Movement in OAB Plane

    the vertices of a triangle are 0, and the points A (a, 0) and B (0,a) where a>0. the point P moves in the plane OAB such that OP square + AP square + BP square = k square, where k is a positive constant. show that k mst be bigger than (2/3)a X square root of 3 i tried. but can't even know...
  2. E

    Help with accelerated coordinate system question

    Ok, so if a ball is thrown vertically upward with velocity v on the Earth's surface. (Air resistance being neglected). I have to show that the ball lands a distance (4wsin(beta)v^3/3g^2) to the west where w is the angular velocity of the Earth's rotation and beta is the colatitude angle...
  3. S

    Coordinate Transforms: Idiot's Guide & Rules of Thumb

    Does anyone know of an “Idiot’s Guide to Coordinate Transforms…”, or good rules of thumb to employ to determine the “proper” set of coordinates for a particular problem? I’m not really having any trouble with the mathematical machinery like finding the Jacobian, etc.; my problem is actually...
  4. Y

    Different coordinate system to sketch (x-2y)=sin(pi(x+y))

    can anyone teach me how to use a different coordinate system to sketch the graph of (x-2y)=sin(pi(x+y)). i have totally no idea
  5. H

    Calculate Center of Mass for 1.05cm Baseball Bat with Linear Density Formula

    A baseball bat of length 1.05 cetimeters has a lenear density given by l=.950 + 1.050x^2/l^2 find the x cooridinate of the center of mass in centimeters. How am I supposed to work this problem?
  6. chroot

    Metrics and coordinate transforms

    Hi all, I'm trying to solve Exercise 1.4.3 in Foster & Nightingale's "A Short Course in General Relativity." The question essentially provides the metric for Euclidean space in spherical coordinates and the matrix representing the coordinate transformation from spherical to cylindrical...
  7. M

    World-sheets, manifolds, and coordinate systems

    I'm trying to understand the manifold properties of world-sheets in string theory. I'm told that world sheets are manifolds and that manifolds are locally Euclidean. So I would like to know the characteristics between the space-time coordinates of the world-sheet given as xμ verses the 2D...
  8. K

    What is the Differential of a Vector?

    Greeting A TA has got me very and utterly confused. He won't be avaible for a few days, so I'm asking you guys. Consider the transformation to cilindrical coord. x-->r.con[the] y-->r.sin[the] z-->z I have the Jabobian (no problems here). He then asks the differential da , where a...
  9. M

    How to find angle of a curve in xy coordinate plane?

    Hi, I think it is atan of the derivative of the curve, is that right? Thanks Matt
  10. T

    Is a 4-D Coordinate Plane Possible?

    Is their a 4-D coordinate plane?
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