The time to sunset can be estimated by holding out your arm, holding your fingers horizontally in

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The time to sunset can be estimated by holding out your arm, holding your fingers horizontally in front of your eyes, and counting the number of fingers that fit between the horizon and the setting Sun.
(a) What is the angular speed, in radians per second, of the Sun's apparent circular motion around the Earth?
(b) Estimate the angle subtended by one finger held at arm's length.
(c) How long in minutes does it take the Sun to "move" through this same angle?
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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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