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  1. M

    off all the united states why is hawaii the most efficient launching site...

    ...for nonpolar satellites? ? Hint look at the spinning earth from above either pole and compare it to a spinning turntable
  2. M

    a communications satellite with a 24-h period hovers over a fixed point on earth.?

    why is it places in orbit only in the plane of earth's equator? hint think of the satellite's orbit as a ring around the earth.
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