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 57EAP

(a)

To determine

The surface area of the giant sphere of radius 1AU around Sun in square meters.

(b)

To determine

Power in watts per square meter.

(c)

To determine

To Explain: The average power per square meter that a solar collector collects on the ground will always be less than what found in part B

(d)

To determine

Orientation of solar collector to optimize the amount of power collected

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A planet orbits 1 AU from a star that is 3.5 times as massive as our Sun. How does the star's luminosity compare? If the star has the same radius as our Sun, what is the temperature of the star compared to the Sun? If Earth's average temperature is 287 K and the Sun were replaced with this star, how would its average temperature change? (Enter a temperature in K. Assume that Earth temperature is proportional to solar flux.)
A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R (recall that symbolizes the Sun). What is its luminosity, L, in units of solar luminosities, L ? Give your answer to three significant figures. answer, expressed in solar luminosities, tells how many times more luminous this star is than the Sun.

Chapter 14 Solutions

The Cosmic Perspective (9th Edition)

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