A science-fiction tale describes an arti
cf7(e6 dbo8sxs**;yq/dw zkxficial "planet" in the form of a band completely encircling a sun (Fig. 5-40). 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 Earth-Sun distance (to m
xsqb*6fskc dd78 o zwe */y(x;ake the climate temperate), 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 planet's year, in Earth days?