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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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Chapter
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Chapter 2, Figure 4
Figure 2.4
(A) A cannon
on a mountain peak fires a projectile. If the projectile is fired faster,
it travels further before hitting the ground. (B) At a sufficiently high speed,
the projectile travels so far that the Earth's surface curves out from under
it, and the projectile is in orbit.
