![]() This friction is generated as a result of a varying tidal force. Definition of tidal heating Tidal heating is a source of internal heat created tidal friction. This varying tidal force essentially stretches and compresses interior as it orbits Jupiter, generating friction and heat. ![]() It is strongest when Io is farthest from Jupiter and weakest when Io is closest to Jupiter. It is strongest when Io is closest to Jupiter and weakest when Io is farthest from Jupiter. What can you conclude about the tidal force acting on Io? ANSWER: The tidal force is the constant throughout orbit. What is the strength of the tidal force acting on Io? Watch the portion of the video that shows the gravitational force on the near and far sides of Io as it orbits Jupiter. Part A Io experiences tidal heating primarily because Hint 1. You may watch the video again at any point. Launch the video below, then answer the following questions. Learning Goal: To understand how we use the theory of gravity and tidal heating to explain observable characteristics of the Galilean moons of Jupiter. Students answer a series of questions that helps them understand how our theory of tidal heating explains the observable phenomena of the Galilean moons. Prelecture Video: Tidal Heating Description: Supported a prelecture video. The particles range in size from dust grains to large boulders, and each particle orbits its planet independently in accord with laws. They are composed of countless individual particles. They are a solid sheet of material around a planet, looking much like a DVD or disk. The are solid, concentric rings around a planet. Part C Which of the following best describes the nature of planetary rings? ANSWER: They are composed of reflective molecules of gas. Spacecraft images show fountains of ice spraying into space from moon Enceladus. Io is the most volcanically active world in the solar system. Jupiter has three moons for which there is evidence of a global, subsurface ocean of liquid water, with the strongest evidence favoring an ocean on Europa. The two moons that are larger than the planet Mercury are Titan and Ganymede, which is also the largest of moons (and largest moon in the solar system). MasteringAstronomy: Print View with Answers ANSWER: Reset Help Scientists have detected lakes of liquid methane and ethane on the surface of Titan. ANSWER: Jupiter and Neptune Jupiter and Uranus Uranus and Neptune Saturn and Neptune Jupiter and Saturn Saturn and Uranus Part B Match the words at the left to the correct blanks in the sentences at right. Now, remember that the fusion rate is very sensitive to temperature (open the first hint to learn why), and you should be able to complete Part A. How does the core temperature depend on the core radius? When the core contracts, the core temperature ANSWER: increases decreases stays the same Just as when you compress air in a bicycle tire pump, compressing the core increases its temperature. ![]() When you think about this fact, you should be able to complete Part A. An increase in either the temperature or density will increase the fusion rate. What conditions make fusion possible? ANSWER: extremely high temperature and high density extremely high temperature but low density low temperature and density It takes high temperature for nuclei to get into close enough contact for fusion, and high density for this to happen with enough likelihood that fusion will continue. What conditions are necessary for fusion? Fusion requires bringing two positively charged nuclei so close together that the strong nuclear force can hold them against the electromagnetic repulsion of their positive charges. Part A The two jovian planets that contain the highest proportions of hydrogen compounds are Hint 1. You can watch the video again at any point. Then, close the video window and answer the questions at right. Keep in mind that these videos offer only a brief introduction to selected topics from the chapter, intended to spur interest that will lead to more study. Prelecture Overview: Jovian Planet Systems Description: This assessment is designed as a quick check of whether a student has actually watched the prelecture video for this chapter. Preview text MasteringAstronomy: Print View with Answers All Assignments Assignment 6 Edit Overview Diagnostics Print View with Answers Assignment 6 Due: 11:59pm on Sunday, NovemTo understand how points are awarded, read the Grading Policy for this assignment. Chapter 10.1 (ASTR) - NOTES FROM CLASS 10.1.
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