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 10, Problem 45EAP
To determine
To Discuss: Things that can be learned about Mars from human missions that can’t be learnt from robotic missions.
Whether it is worth sending humans to Mars.
Whether potential benefits of a human mission would make a mission more worthwhile.
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This is a preliminary version of the Mars Project - to think about the time it takes to
complete a Mars mission. Consider the following simplified Earth to Mars transfer:
• Departs Earth
• Enter Mars orbit
• Orbit Mars orbit for some time
•
Exit Mars orbit to return
• Enter Earth orbit
a. What is the flight time, in days, from Earth to Mars? What is the return flight time?
[Answer: 258.83 days]
b. Where does Mars need to be (outbound) to reach it at the end of the Hohmann
transfer (tip: 180° "later").
[Answer: 44.329°]
c. To return to Earth with a Hohmann transfer, the opposite will need to be true:
Earth must be at a specific angle at the time of departure from Mars for the
spacecraft to reach Earth's orbit when Earth is there. What is that angle?
[Answer: -75.097°]
d. When is the first opportunity to return to Earth for that optimal Hohmann transfer?
[Answer: 454.70 days]
e. What is the total round trip time to Mars for this ideal Hohmann transfer?
CO2 and planetary warming: understanding Earth’s complicated atmosphere Mars has an atmospheric pressure of 6 mbar (compared with Earth atmosphere pressure of 1013 mbar), 96% of which is CO2. The average calculated temperature of Mars is -57°C, whereas the actual average temperature is -55°C so that the amount of warming due to CO2 is only 2°C. On the other hand, the average calculated temperature of Earth, with 0.4 mbar of CO2, is -19°C, whereas the actual average temperature is 15°C so that the amount of warming due to CO2 is 34°C, much greater than that on Mars, which has higher CO2 concentration. Explain how this is possible.
Activity #1. Compare and Contrast. Similarities and differences of Venus, Earth and Mars.
Do this on a separate sheet of paper.
1. Compare and contrast the three (3) terrestrial planets using table 1.
2. Provide explanations for your observations using table 2.
3. Answer the following guide questions.
Guide questions:
1. Does planet size affect gravity?
2. Why do you think Venus has the highest mean temperature among the three planets?
3. Is presence of water a primary factor for a planet to sustain life? Why or why not?
4. Based on your observations using table 2, what are the notable features that makes the
earth the only habitable planet among the three terrestrial planets?
5. What conclusions can you make?
Chapter 10 Solutions
The Cosmic Perspective (9th Edition)
Ch. 10 - Prob. 1VSCCh. 10 - Use the following questions to check your...Ch. 10 - Use the following questions to check your...Ch. 10 - Use the following questions to check your...Ch. 10 - Use the following questions to check your...Ch. 10 -
Briefly describe the basic atmospheric...Ch. 10 - Prob. 2EAPCh. 10 - Prob. 3EAPCh. 10 - What is the greenhouse effect? Describe how it...Ch. 10 - What factors determine a world’s “no greenhouse”...
Ch. 10 - Describe Earth’s basic atmospheric structure, from...Ch. 10 - Prob. 7EAPCh. 10 - Why does convection occur in the troposphere,...Ch. 10 - Prob. 9EAPCh. 10 - What is a magnetosphere? Describe its role in...Ch. 10 - Prob. 11EAPCh. 10 - Prob. 12EAPCh. 10 - Prob. 13EAPCh. 10 - Prob. 14EAPCh. 10 - Prob. 15EAPCh. 10 - Prob. 16EAPCh. 10 - Prob. 17EAPCh. 10 - Prob. 18EAPCh. 10 - Prob. 19EAPCh. 10 - Describe four ways in which Earth’s atmosphere is...Ch. 10 - What is the carbon dioxide cycle, and why is it so...Ch. 10 - Prob. 22EAPCh. 10 - Prob. 23EAPCh. 10 - Prob. 24EAPCh. 10 - Prob. 25EAPCh. 10 - Does It Make Sense? Decide whether the statement...Ch. 10 - Prob. 27EAPCh. 10 - Prob. 28EAPCh. 10 - Prob. 29EAPCh. 10 - Prob. 30EAPCh. 10 - Prob. 31EAPCh. 10 - Prob. 32EAPCh. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Prob. 37EAPCh. 10 - Prob. 38EAPCh. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Prob. 44EAPCh. 10 - Prob. 45EAPCh. 10 - Prob. 49EAPCh. 10 - Atmospheric Structure. Study Earth’s average...Ch. 10 - Magic Mercury. Suppose we could magically give...Ch. 10 - A Swiftly Rotating Venus. Suppose Venus rotated as...Ch. 10 - Prob. 53EAPCh. 10 - Prob. 54EAPCh. 10 - Two Paths Diverged. Briefly explain how the...Ch. 10 - Prob. 56EAPCh. 10 - Feedback Processes in the Atmosphere. As the Sun...Ch. 10 - Prob. 58EAPCh. 10 - Prob. 59EAPCh. 10 - Prob. 60EAPCh. 10 - The Mass of an Atmosphere. What is the total mass...Ch. 10 - The Role of Reflectivity. By assuming 0% and 100%...Ch. 10 - The Cooling Clouds of Venus. Table 10.2 shows that...Ch. 10 - Mars’s Elliptical Orbit. Mars’s distance from the...Ch. 10 - Escape from Venus. Calculate the escape velocity...
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