The mass of an average comet's nucleus is about 1.0 ✕ 1014 kg. If the Oort cloud contains 2.0 ✕ 1011 comet nuclei, what is the mass of the cloud in units of Earth masses? (Note: Earth's mass is 5.97 ✕ 1024 kg.) ________ m Compare that with Uranus's mass. (Note: Uranus's mass in units of Earth's mass is 14.5 M.) mass of the Oort Cloud / mas of Uranus =________

The mass of an average comet's nucleus is about 1.0 ✕ 1014 kg. If the Oort cloud contains 2.0 ✕ 1011 comet nuclei, what is the mass of the cloud in units of Earth masses? (Note: Earth's mass is 5.97 ✕ 1024 kg.) m Compare that with Uranus's mass. (Note: Uranus's mass in units of Earth's mass is 14.5 M.) mass of the Oort Cloud / mas of Uranus =

The Solar System

10th Edition

ISBN:9781337672252

Author:The Solar System

Publisher:The Solar System

Chapter16: Meteorites, Asteroids And Comets

Section: Chapter Questions

Problem 15P

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The mass of an average comet's nucleus is about 1.0 ✕ 1014 kg. If the Oort cloud contains 2.0 ✕ 1011 comet nuclei, what is the mass of the cloud in units of Earth masses? (Note: Earth's mass is 5.97 ✕ 1024 kg.)________ m
The mass of an average comets nucleus is about 1.0 1014 kg. If the Oort Cloud contains 2.0 1011 comet nuclei, what is the mass of the cloud in units of Earth masses? In units of Jupiters mass? (Notes: Earths mass in kg can be found in its Celestial Profile. Jupiters mass in kg can be found in its Celestial Profile.)
If the velocity of the solar wind is about 4.0 102 km/s and the visible tail of a comet is 1.0 108 km long, how many days does an atom in the solar wind take to travel from the nucleus to the end of the visible tail? (Nate: 1 day = 86,400 seconds.)
What 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.)
Why do astronomers conclude that asteroids were never part of a full-sized planet?
Does Uranus have enough mass to have formed by gravitational collapse? How do you know?
What is the difference between a meteoroid and an asteroid? Is there a sharp distinction?
If the velocity of the solar wind is about 4.0 ✕ 102 km/s and the visible tail of a comet is 5.0 ✕ 108 km long, how many days does an atom in the solar wind take to travel from the nucleus to the end of the visible tail? (Note:1 day = 86,400 seconds.)
Why is the composition of a comet typically dominated by volatile materials (frozen ices)? choose one of the following: a. rock and metal could not condense out of the solar nebula at extreme distances from the sun b. most of the metal in the solar system is locked up inside the terrestrial planets c. metals are not stable in the outer solar system d. elements that form ices (as opposed to rock & metals) are more abundant in our solar system
Calculate the Roche radius (in km) for Uranus. The diameter of Uranus is 5.11 ✕ 104 km.
It is believed there are 2.7 x 1012 comets in the Oort Cloud, which has a radius of 71000.0 AU. Calculate the average volume that each comet has to itself. Then take the cube root of the average volume per comet to find their typical spacing in AU.
Calculate 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.)