A science-fiction tale describes an artificial planet in
Chapter 5, Problem 88(choose chapter or problem)
A science-fiction tale describes an artificial planet in the form of a band completely encircling a sun (Fig. 550). The inhabitants live on the inside surface (where it is always noon). Imagine that this sun is exactly like our own, that the distance to the band is the same as the EarthSun distance (to make the climate livable), and that the ring rotates quickly enough to produce an apparent gravity of g as on Earth. What will be the period of revolution, this planets year, in Earth days?
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