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sphere

  1. The Kilted Yaksman

    Interesting (to me, anyway) question about theoretical visual.

    I read this one somewhere a while back and have never seen anybody with a good scientific background take a whack at it. Suppose, sometime in a Star Trek like future, you are able to manufacture a large perfect sphere, say 5m in diameter, and make the interior surface mirrored, and leave it...
  2. rustytunes

    Avogadro Project, Re-defining the Kilogram

    Making the roundest object in the world - very cool stuff: CSIRO scientists and optical engineers are working to turn a silicon cylinder into the perfect one kilogram sphere. The Avogadro Project plan is to bring together enough atoms of one substance, silicon, to make the perfect kilo...
  3. J

    Math Problem: Figuring the Volume of a Sphere

    I've been trying to figure the volume of a sphere that is 4 meters in diameter. I used the equation 4/3 times pi times radius cubed. The radius in this case being two meters. The answer I got is 8.37333333 m^3 I did the same to figure the volume of a sphere 0.1 meters in diameter. The answer I...
  4. Ladewig

    Geometry question - points on a sphere

    If one were to place two points as far as possible from each other on a sphere, they would be 180&#176 apart. Similarly, three points could be placed as far as possible from each other by positioning them 120&#176 from each other The optimal solition for four points would be to imagine a...
  5. L

    The perfect circle or sphere.

    Is there something in this universe that is perfectly round? I think that the event horizon of a black hole is a perfect sphere, but I'm not sure. Maybe some sub-atomic particle could be classified as a perfect sphere. What do you think?

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