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I am in deperate need of help Physics

  1. Apr 14, 2008 #1
    I am in deperate need of help!!! Physics

    The question:
    after our sun exhausts its nuclear fuel, its ulitmate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to the radius of the earth. Calculate: The average density of the white dwarf; the free fall acceleration; the gravitational potential energy associated with a 1.00-kg object on its surface.

    I don't even know where to start. I'm lost. PLEASE HELP!!!
  2. jcsd
  3. Apr 14, 2008 #2


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    Read your class notes and look up the mass of the sun and the radius of the earth.
  4. Apr 14, 2008 #3
    Thanks!! That got me started. I don't know where my head is at today!! I think I've got the rest.
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