Cosmic Perspective Fundamentals
Cosmic Perspective Fundamentals
3rd Edition
ISBN: 9780134988504
Author: Bennett, Jeffrey O., Donahue, M. (megan), SCHNEIDER, Nicholas, Voit, Mark
Publisher: Pearson,
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Chapter 2, Problem 9QQ

Choose the best answer to each of the following. Explain your reasoning.

The reason we do not have a solar eclipse at every moon is that (a) a solar eclipse can occur only at full moon. (b) the Moon’s orbit is inclined relative to Earth’s orbit around the Sun. (c) the nodes of the Moon’s orbit gradually move around the orbit.

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Consider the circuit shown in the figure below. (Let R = 12.0 (2.) 25.0 V 10.0 www 10.0 Ω b www 5.00 Ω w R 5.00 Ω i (a) Find the current in the 12.0-0 resistor. 1.95 × This is the total current through the battery. Does all of this go through R? A (b) Find the potential difference between points a and b. 1.72 × How does the potential difference between points a and b relate to the current through resistor R? V
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