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Calculate the MASS of the sun

  1. Nov 27, 2006 #1
    a)calculate the mass of the sun from the radiuos of the earth's orbit (1.5 x 10^11m), the earth's period in its orbit, and the gravitational constant of G.

    Sohere we are given the speedof light, 3x10^8, and G as 6.673x10^-11

    so i get that v=2pi x r / T
    and that r= ct

    how do i continue from then on to get the mass of the sun that is
    1.98892 × 10^30 kilograms
  2. jcsd
  3. Nov 27, 2006 #2
    how would i use 2pi * r /T = V
    then r = ct?
  4. Nov 27, 2006 #3
    zz help! plzzz
  5. Nov 27, 2006 #4
    What are we doing with the speed of light? Stick with summing the forces and you'll be ok.
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