The Cosmic Perspective (9th Edition)
The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 14, Problem 50EAP

Solar Energy Output. Observations over the past century show that the Sun’s visible-light output varies by less than 1%, but its x-ray output can vary by a factor of 10 or more. Explain why changes in x-ray output can be so much larger than those in the output of visible light.

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Solar scientists want to measure the temperature inside the sun by sending in probes. Imagine that temperature increases by 1 million◦C for every 10,000 km below the surface. A probe that can handle a temperature of x million degrees costs x³ million dollars. a. How much would it cost to measure the temperature 10,000 km down? b. How much would it cost to measure the temperature 100,000 km down? c. How much would it cost to measure the temperature 200,000 km down?
From which atmospheric layer of the Sun did the photons originate that resulted in sunburn? How do you know?

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The Cosmic Perspective (9th Edition)

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