A small stationary surface of area A 1 = 10 ?4 m 2 emits diffusely with a
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A small stationary surface of area A1 = 10?4 m2 emits diffusely with a total intensity of Ic = 100 W/m2 ? sr. A second surface of equivalent area A2 = 10?4 m2 is located at a fixed distance of r = 0.5 m from A1. The connecting line between the two surfaces remains perpendicular o A1, while A2 rotates at an angular frequency of ?2 = d?2/dt = 2 rad/s. What is the amount of energy intercepted by the two sides of Ab during one complete revolution?
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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