The Cosmic Perspective (8th Edition)
The Cosmic Perspective (8th Edition)
8th Edition
ISBN: 9780134059068
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 23, Problem 45EAP
To determine

Draw the graph that shows orbital speed depends on the distance from the galactic center for each of the following three hypothetical galaxies.

(a) a galaxy with all its mass concentrated at its center

(b) a galaxy with a constant mass density within 20,000 light- years of its center, and zero density beyond that distance

(c) a galaxy with constant mass density within 20,000 light- years of its center, and beyond that an enclosed mass that increases proportionally to the distance from the center

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For the following circuit, consider the resistor values given in the table and that it is powered by a battery having a fem of ε= 10.0 V and internal resistance r= 1.50 Ω. Determine:(a)Equivalent resistance from points a and b.b)Potential difference of EACH of the seven resistors.

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The Cosmic Perspective (8th Edition)

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