FOUNDATIONS OF ASTRONOMY (LL)-W/MINDTAP
14th Edition
ISBN: 9780357000502
Author: Seeds
Publisher: CENGAGE L
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Textbook Question
Chapter 22, Problem 4P
What is the escape velocity from the surface of Ganymede? Ganymede’s mass is 1.5 × 1023 kg and its radius is 2.6 × 103 km. (Hint: Use the formula for escape velocity, Eq. 5-1b. The formula requires input quantities in kg and m.)
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Compare Titan to Rhea. Estimate the strength of surface gravity on Titan compared to the gravity on Titan. How does this affect the possibility of an atmosphere on each?
Use g=GM/R2
Titan Radius: 2,575 km, Mass: 2.31 x 1021 kg
Rhea Radius: 764 km, Mass: 1.35 x 1023 kg
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Tutorial
Based on the orbital properties of Uranus, how far across the sky in arc seconds does it travel in one Earth
day? The average orbital radius is 2.88 x 109 km and the period is 84.0 years. (Assume Uranus and the Earth
are at the closest point to one another in their orbits.)
How many full Moons does this distance cover if the Moon has an angular diameter of 0.5 degrees?
Part 1 of 4
We first need to determine how fast the planet is moving across the sky. If we know the period and the
distance between the Sun and the planet we can calculate the velocity using:
2ar
which will tell us how many kilometers the planet travels in a day if we convert the period into days.
days
= (P
years'
|days/year
Pdays
days
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Chapter 22 Solutions
FOUNDATIONS OF ASTRONOMY (LL)-W/MINDTAP
Ch. 22 - Describe four differences between the Jovian...Ch. 22 - Why is Jupiter more oblate than Earth? Just...Ch. 22 - Which molecules and atoms are Jupiter and Saturn...Ch. 22 - What determines which cloud layers are found at...Ch. 22 - Describe a hypothesis explaining why Jupiter emits...Ch. 22 - How does beltzone circulation transport energyby...Ch. 22 - Why are belts and zones wrapped entirely around...Ch. 22 - What ingredients are needed to power a dynamo...Ch. 22 - Why are magnetic phenomena such as extensive...Ch. 22 - How do the interiors of Jupiter and Saturn differ?...
Ch. 22 - Which planet formation step did the Jovian planets...Ch. 22 - Why is Jupiters moon lo called a regular...Ch. 22 - Why is Saturns moon Phoebe called an irregular...Ch. 22 - If Jupiter had a satellite the size of our own...Ch. 22 - The density of Earths Moon is 3.3 g/cm3. Which of...Ch. 22 - Ganymede was once completely molten on the inside....Ch. 22 - Describe evidence of tectonic features seen on...Ch. 22 - Why are no craters seen on lo and few seen on...Ch. 22 - Why should you expect lo to suffer more impacts...Ch. 22 - How can you be certain that Jupiters rings do not...Ch. 22 - Why are the belts and zones in the atmosphere of...Ch. 22 - Describe the composition of Saturn from its center...Ch. 22 - If Saturn had no moons, do you think it would have...Ch. 22 - How can Titan keep an atmosphere when Titan is...Ch. 22 - What should the interior composition of Titan be...Ch. 22 - If you were able to stand on the surface of Titan...Ch. 22 - Does Titan experience volcanism today? Impact...Ch. 22 - Describe the types of geological activity observed...Ch. 22 - More Jovian moons are geologically active than...Ch. 22 - Prob. 30RQCh. 22 - If you piloted a spacecraft to visit Saturns moons...Ch. 22 - The ring systems around Jupiter and Saturn lie...Ch. 22 - Saturns rings are primordial, meaning that they...Ch. 22 - What is understood to be the cause of gaps in ring...Ch. 22 - What is understood to be the cause of ripples in...Ch. 22 - Why would you expect research in archaeology to be...Ch. 22 - What is the angular diameter of Jupiter as seen...Ch. 22 - Prob. 2PCh. 22 - What is the angular diameter of Jupiter as seen...Ch. 22 - What is the escape velocity from the surface of...Ch. 22 - Calculate the mass of Callisto using a value for...Ch. 22 - Prob. 6PCh. 22 - Calculate the radius of Jupiters Roche limit for a...Ch. 22 - How long does the eastward wind at the equator of...Ch. 22 - What is the orbital velocity and period of a ring...Ch. 22 - If you were to record the spectrum of Saturn as...Ch. 22 - Prob. 11PCh. 22 - Jupiter is about 71,000 km in radius. The...Ch. 22 - Saturn is about 60,000 km in radius, and its rings...Ch. 22 - Look at Figure 22-4b. Compare the visual and UV...Ch. 22 - Prob. 2LTLCh. 22 - Prob. 3LTLCh. 22 - The Cassini spacecraft recorded the image shown...
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- What is the difference in the orbital velocities of the two shepherd satellites of Uranus, Cordelia and Ophelia, which have orbital radii of 49,800 km and 53,800 km, respectively? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.)arrow_forwardWhat is the orbital velocity of Miranda around Uranus? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.) (Note: Necessary data are given in Celestial Profile: Uranus and Appendix Table A-11.)arrow_forwardCalculate the mass of Callisto using a value for its density of 1.8 g/cm3. Convert your answer to units of kg, and compare to the mass of Ganymede given in Problem 5. (Notes: Density is mass divided by volume, and the volume of a sphere is 43r3. Necessary data are given in Appendix Table A-11.) 4. What is the escape velocity from the surface of Ganymede? Ganymedes mass is 1.5 1023 kg and its radius is 2.6 103 km. (Hint: Use the formula for escape velocity, Eq. 5-1b. The formula requires input quantities in kg and m.)arrow_forward
- What is the orbital velocity and period of a ring particle at the outer edge of Saturns A ring? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.) (Note: The radius of the outer edge of the A ring is 136,500 km.)arrow_forwardGanymede was once completely molten on the inside. True or false? How do you know?arrow_forwardHow can small worlds like Triton and Pluto have atmospheres whereas a larger world such as Ganymede has none?arrow_forward
- What should the interior composition of Titan be if its density is 1.9 g/cm3? How do you know?arrow_forwardWhat is the maximum angular diameter of Uranus as seen from Earth? Of Neptune? (Hint: Use the small-angle formula, Eq. 3-1.) (Note: Necessary data are given in their Celestial Profiles.)arrow_forwardCalculate Uranuss Roche radius. Are all of Uranuss rings inside the Roche limit? Are any of the moons within the Roche limit? (Notes: The Roche limit is defined in Chapter 22. Necessary data are given in Celestial Profile: Uranus and Appendix Table A-11. The structure of the Uranian system is displayed in the Concept Art: Uranuss and Neptunes Rings.)arrow_forward
- How many times more pressure exists in the interior of Jupiter compared to that of Earth?arrow_forwardGiven the size of Tritons orbit (r = 355,000 km) and its orbital period (P = 5.88 days), calculate the mass of Neptune. (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.)arrow_forwardLook at Figure 21-11. Which molecule(s) can escape from Earths gravity? From Mars? From Venus? Figure 21-11 Loss of atmospheric gases. Dots represent the escape velocity and temperature of various Solar System bodies. The lines represent the typical highest velocities of molecules of various masses. The Jovian planets have high escape velocities and can hold onto even the lowest-mass molecules. Mars can hold only the more massive molecules, and the Moon has such a low escape velocity that even massive molecules can escape.arrow_forward
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