The Cosmic Perspective Fundamentals (2nd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 2, Problem 8QQ

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

The fact that we always see the same face of the Moon tells us that (a) the Moon does not rotate. (b) the Moon’s rotation period is the same as its orbital period. (c) the Moon looks the same on both sides.

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Using Kepler's 3rd law solve the following problem.  Show your work and  highlight your answer.     In a distant star system there are many inhabitable planets.  One of these planets is named Qomar.  Qomar is 3.2 AU's from its star and takes 6.5 Earth years to go around its  star once.    There is another planet in the same star system called Ferenginar.   Ferenginar is 0.9 AUs from the star.  What is the length of a Ferengi year (on Ferenginar) in terms of Earth years?
Problem 2. Planetary Body Composition:  Density (Links to an external site.) of the Earth  (Palen, et. al., 1st Edition,  Chapter 6, problem 70) Earth’s mean (Links to an external site.) radius is 6,378 km and its mass is 5.97 x 1024 kg. CALCULATE Earth’s average (Links to an external site.) density. SHOW YOUR WORK. DO NOT LOOK UP THIS VALUE! The average density of Earth’s crust is 2,600 kg/m3. What does this tell you about Earth’s interior?
Show your complete, clear and detailed solution. Please explain also how did you get your answer. Thank you.
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Kepler's Three Laws Explained; Author: PhysicsHigh;https://www.youtube.com/watch?v=kyR6EO_RMKE;License: Standard YouTube License, CC-BY