THIS MONTH'S QUIZ
(Consider the earth to be a perfect sphere with radius 6400 km.)
1. A geostationary satellite is positioned directly over a point on the equator at a height of 36,000 km above the earth's surface. What is the latitude of the most northerly point on the earth's surface from which the satellite can be seen?
2. From what fraction of the earth's surface can the satellite be seen?
3. There are, in fact, three such satellites positioned at the vertices of an equilateral triangle. What is the latitude of the most northerly point from which two of these satellites are visible?
