Answered: (a) Calculate the power per square…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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(a) Calculate the power per square meter reaching Earth’s upper atmosphere from the Sun. (Take the power output of the Sun to be 4.00×10²⁶ W.) (b) Part of this is absorbed and reflected by the atmosphere, so that a maximum of 1.30 kW/m² reaches Earth’s surface. Calculate the area in km² of solar energy collectors needed to replace an electric power plant that generates 750 MW if the collectors convert an average of 2.00% of the maximum power into electricity. (This small conversion efficiency is due to the devices themselves, and the fact that the sun is directly overhead only briefly.) With the same assumptions, what area would be needed to meet the United States’ energy needs (1.05×10²⁰ J)? Australia’s energy needs (5.4×10¹⁸ J)? China’s energy needs (6.3×10¹⁹ J)? (These energy consumption values are from 2006.)

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