21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 12.2, Problem 12.2CYU
To determine
The result obtained from the remnants of volcanic activity on the asteroid Vesta.
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5) What is the ratio of the number of asteroid impacts on the moon to the number of impacts
on Earth? Assume the asteroids are originally traveling 15 km/s and use the following data.
Mass: 5.97x1024 kg Earth, 7.3x1022 kg moon
Radius: 6372 km Earth, 1738 km moon
Note we count the number of craters on the moon to infer the number of impacts on Earth
because many Earth craters have been hidden by erosion.
Pluto’s density is 1.8 g/cm 3. This implies that Pluto
a.
has a large iron-nickel core.
b.
is about 50 percent water and 50 percent rocky material.
c.
should have a magnetic field about one-third as strong as Earth’s.
d.
is still geologically active.
e.
probably has a small ring system that hasn’t yet been detected.
Planetary scientists are excited about the possibility that some of the moons in the outer solar system might have a global subsurface ocean of liquid water.
It's uncertain whether or not Jupiter's moon Callisto has a subsurface ocean, but some scientists think it might.
Let's imagine that a short distance below the surface, Callisto has a water layer 20,000 meters thick. Callisto has a radius of 2.410x106 meters.
Earth has a radius of 6.378x106 meters, and its oceans are equivalent to a layer of water 3000 meters thick all over the surface of the planet.
Which of the following is an accurate comparison of the Earth’s amount of liquid water with this estimate of the amount of water Callisto might have?
Group of answer choices
If this scenario is correct, Earth and Callisto have roughly the same amount of liquid water.
If these scientists are right, Callisto has about one-sixth as much liquid water as the Earth does.
If these scientists are right, Callisto has about 11 times as…
Chapter 12 Solutions
21st Century Astronomy
Ch. 12.1 - Prob. 12.1CYUCh. 12.2 - Prob. 12.2CYUCh. 12.3 - Prob. 12.3ACYUCh. 12.3 - Prob. 12.3BCYUCh. 12.4 - Prob. 12.4CYUCh. 12.5 - Prob. 12.5CYUCh. 12 - Prob. 1QPCh. 12 - Prob. 2QPCh. 12 - Prob. 3QPCh. 12 - Prob. 4QP
Ch. 12 - Prob. 5QPCh. 12 - Prob. 6QPCh. 12 - Prob. 7QPCh. 12 - Prob. 8QPCh. 12 - Prob. 9QPCh. 12 - Prob. 10QPCh. 12 - Prob. 11QPCh. 12 - Prob. 12QPCh. 12 - Prob. 13QPCh. 12 - Prob. 14QPCh. 12 - Prob. 15QPCh. 12 - Prob. 16QPCh. 12 - Prob. 17QPCh. 12 - Prob. 18QPCh. 12 - Prob. 19QPCh. 12 - Prob. 20QPCh. 12 - Prob. 22QPCh. 12 - Prob. 23QPCh. 12 - Prob. 24QPCh. 12 - Prob. 25QPCh. 12 - Prob. 26QPCh. 12 - Prob. 27QPCh. 12 - Prob. 28QPCh. 12 - Prob. 29QPCh. 12 - Prob. 30QPCh. 12 - Prob. 31QPCh. 12 - Prob. 32QPCh. 12 - Prob. 33QPCh. 12 - Prob. 34QPCh. 12 - Prob. 35QPCh. 12 - Prob. 36QPCh. 12 - Prob. 37QPCh. 12 - Prob. 38QPCh. 12 - Prob. 39QPCh. 12 - Prob. 40QPCh. 12 - Prob. 41QPCh. 12 - Prob. 42QPCh. 12 - Prob. 43QPCh. 12 - Prob. 44QP
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