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 11QQ
Choose the best answer to each of the following. Explain your reasoning.
When we see Saturn going through a period of apparent retrograde motion, we know that (a) Saturn is temporarily moving backward in its orbit around the Sun. (b) Earth is passing Saturn in its orbit, with both planets on the same side of the Sun. (c) Saturn and Earth must be on opposite sides of the Sun.
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As discussed in class, the moon is receding from the Earth due to tides at a rate of ~4 cm/year. Let’s assume that rate has been constant throughout time (it wasn’t, but we can use it to illustrate some key points). Its current semi-major axis is 384,400 km.a) If the moon formed 4.5 billion years ago and has been receding from the Earth ever since, what was its original semi-major axis? What was its original orbital period?b) What would the apparent size of the Moon have been in the sky as viewed from Earth? That is, in Hmwk 2, you were told the diameter of the Moon spans about 0.5o when viewed from Earth today. What would it have been when the Moon first formed?
Reletive Numbers
Relevant Numbers1 AU = 150,000,000 km = 1.5x108 kmEccentricity of Earth’s Orbit: 0.0167Radius of Earth: 6371 kmMass of Earth: 5.96x1024 kgRadius of the Moon: 1737 kmMass of Moon: 7.34x1022 kgRadius of Mars: 3390 kmMass of Mars: 6.4x1023 kgRadius of the Sun: R⦿=696,300 kmMass of the Sun: M⦿=2x1030…
Drag the moon to various locations in order to determine the quantitative effect of distance upon the gravitational force. Examine the effect of doubling, tripling and quadrupling the distance of separation (as measured from planet'scenter). Consider the planet'ssurface to be a distance of one Earth-radius (1 Rplanet). Use the table at the right to record data for whole-number multiples of Rplanet.Use your data to complete the following sentences.If the separation distancebetween the moonand the planetis ... a. ... increased by a factor of 2, then the Fgravis ______________ by a factor of _______.b. ... increased by a factor of 3, then the Fgravis ______________ by a factor of _______.c. ... increased by a factor of 4, then the Fgravis ______________ by a factor of _______
Chapter 2 Solutions
The Cosmic Perspective Fundamentals (2nd Edition)
Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Prob. 2QQCh. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....
Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Choose the best answer to each of the following....Ch. 2 - Prob. 13SEQCh. 2 - Prob. 14SEQCh. 2 - Explain all answers clearly, using complete...Ch. 2 - Prob. 16SEQCh. 2 - Explain all answers clearly, using complete...Ch. 2 - Prob. 18SEQCh. 2 - Prob. 19SEQCh. 2 - Prob. 20SEQCh. 2 - Explain all answers clearly, using complete...Ch. 2 - Explain all answers clearly, using complete...
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