21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 12, Problem 43QP
To determine
The volume of comet tail that would hold
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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.)
A comet with a 2km diameter will make a crater about 20 km in diameter. If the comet has a mass of 4.5 x1012kg and impacts the surface at 35 km/sec, what is the kinetic energy of the comet in Joules?
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 =________
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 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.)arrow_forwardWhat evidence indicates that a comets nucleus is rich in ices?arrow_forwardRefer to Example 13.1. How would the calculation change if a typical comet in the Oort cloud is only 1 km in diameter?arrow_forward
- We saw that the Oort cloud extends to 50,000 AU. What is the orbital periodof a comet with a semimajor axis of 50,000 AU?arrow_forwardA typical comet contains some 1013 kg of water ice. How many comets would have to strike Earth in order to account for the roughly 2×1021 kg of water presently found on our planet? If this amount of water accumulated over a period of 500 million years, how frequently must Earth have been hit by comets during that time?arrow_forwardWhat is the asteroid's orbital radius? What is the asteroid's orbital speed?arrow_forward
- 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.arrow_forwardSuppose you were designing a spacecraft that would match course with a comet and move with it for a while. What sorts of instruments would you put on board to gather data, and what would you like to learn?arrow_forwardWhat is the difference between a meteoroid and an asteroid? Is there a sharp distinction?arrow_forward
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