Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 21, Problem 8P
To determine
The ratio of the velocity of the molecular hydrogen at Venus’s temperature to the escape velocity of the Venus and its significance.
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What is the escape velocity is km/s from Venus' exosphere, which begins about 202 km above the surface ? Assume the gravitational constant is G= 6.67 x10-11m3 kg-1s-2, and that's Venus has a mass of 5.2e+24 kg and a radius of 6500.0 km
What is the escape velocity in km/s from Venus' exosphere, which begins about 168 km above the surface? Assume the gravitational constant is G = 6.67 × 10-11 m3 kg-1 s-2, and that Venus has a mass of 4.9e+24 kg and a radius of 5800.0 km.
Chapter 21 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 21 - Describe four ways Venus is similar to Earth...Ch. 21 - Why might you expect that Venuss surface...Ch. 21 - Describe and explain changes in Venuss surface...Ch. 21 - Describe sources and sinks of CO2, if any, on...Ch. 21 - Does Venuss surface experience meteorite impacts...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - Why isnt the crust of Venus broken into mobile...Ch. 21 - Do either Venus or Mars have composite volcanoes?...Ch. 21 - What evidence can you give that Venus once had...Ch. 21 - What evidence shows that Venus has been resurfaced...
Ch. 21 - Describe four ways Mars is similar to Earth today....Ch. 21 - How are todays atmospheres of Venus and Mars...Ch. 21 - Where is the oxygen on Mars today? How do you...Ch. 21 - Why doesnt Mars have folded mountain ranges like...Ch. 21 - Why isnt the crust of Mars broken into mobile...Ch. 21 - What were the canals on Mars eventually found to...Ch. 21 - How can planetary scientists estimate the ages of...Ch. 21 - Propose an explanation for the nearly pure CO2...Ch. 21 - Prob. 19RQCh. 21 - Describe sources and sinks of CO2, if any, on Mars...Ch. 21 - Does Marss surface experience any meteorite...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - What surface features on Mars today indicate that...Ch. 21 - Why are Phobos and Deimos non-spherical? Why is...Ch. 21 - How are a weather radar map and an image of a...Ch. 21 - Atmospheric jet streams on Venus travel at about...Ch. 21 - How long would radio signals take to travel from...Ch. 21 - What is the maximum angular diameter of Venus as...Ch. 21 - The Pioneer Venus orbiter circled Venus with a...Ch. 21 - Calculate the velocity of Venus as it orbits the...Ch. 21 - Prob. 6PCh. 21 - If the Magellan spacecraft transmitted radio...Ch. 21 - Prob. 8PCh. 21 - What is the angular size of Phobos observed from...Ch. 21 - Prob. 10PCh. 21 - Prob. 11PCh. 21 - Deimos is about 13 km in diameter and has a...Ch. 21 - Prob. 1SOPCh. 21 - Mercury averages only 0.39 AU from the Sun, Venus...Ch. 21 - The radius of Mars is about 3400 km, and its moons...Ch. 21 - Look at Figure 21-1. Compare temperature profiles...Ch. 21 - Look at the map of the Hawaiian chain of islands...Ch. 21 - Look at Figure 21-11. Which molecule(s) can escape...Ch. 21 - Volcano Sif Mons on Venus is shown in this radar...Ch. 21 - Olympus Mons on Mars is an enormous volcano. In...
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- What is the wavelength of the most intense radiation emitted from the surface of Mercury at high noon? In which band of the electromagnetic spectrum is that wavelength? (Hints: Use Wiens law, Eq. 7-2, and examine Figure 6-3.)arrow_forwardLook at Figure 21-1. Compare temperature profiles of Venuss and Earths atmospheres. Describe the differences between the two profiles. Figure 21-1 (a) Image of Venus made from an approaching spacecraft using a UV filter designed to bring out small contrast differences in the clouds that completely hide the planets surface. None of these details would be visible to an unaided human eye. (b) The four main cloud layers in the atmosphere of Venus are more than ten times higher above the surface than ordinary Earth clouds. If you could insert thermometers into Venuss atmosphere at different levels, you would find that the lower atmosphere is much hotter than that of Earth, as indicated by the red line in the graph, but temperatures in the two planets upper atmospheres are quite similar.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
- Which molecules and atoms are Jupiter and Saturn able to retain in their atmospheres that cant be retained in Earths atmosphere? (Hints: See Table 22-1 and Figure 21-11.)arrow_forwardWhat evidence can you give that Venus once had significant amounts of water? Where did that water come from? Where did it go?arrow_forwardWhy is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?arrow_forward
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