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 19, Problem 1VSC
To determine

The color that represents the brightest radio emission and the color that represents lowest levels of brightness.

Expert Solution & Answer
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Answer to Problem 1VSC

Solution:

The color that represents brightest radio emission is white and the color that represents lowest levels of brightness is black/dark blue.

Explanation of Solution

As the cold, dense molecular clouds are concentrated in a narrow layer near the mid plane of the galactic disk, the white color in the middle represents the brightest radio emission.

As we see away from the mid plane, there is less concentration of molecular clouds. So, the black/dark blue color represents the lowest levels of brightness.

Conclusion:

The color that represents brightest radio emission is white and the color that represents lowest levels of brightness is black/dark blue.

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Consider the circuit shown in the figure. The battery has emf ε = 69 volts and negligible internal resistance. The inductance is L = 0.4 H and the resistances are R 1 = 12 Ω and R 2 = 9.0 Ω. Initially the switch S is open and no currents flow. Then the switch is closed. After leaving the switch closed for a very long time, it is opened again. Just after it is opened, what is the current in R 1?
A capacitor with a capacitance of C = 5.95×10−5 F is charged by connecting it to a 12.5 −V battery. The capacitor is then disconnected from the battery and connected across an inductor with an inductance of L = 1.55 H . At the time 2.35×10−2 s after the connection to the inductor is made, what is the current in the inductor? At that time, how much electrical energy is stored in the inductor?
Can someone help me with this question. Thanks.
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