MODIFIED MAST ASTRONOMY:COSMIC PERSPECTI
MODIFIED MAST ASTRONOMY:COSMIC PERSPECTI
9th Edition
ISBN: 9780136904496
Author: Bennett
Publisher: PEARSON
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Chapter 12, Problem 48EAP

Impact Energies. A relatively small impact crater 20 kilometers in diameter could be made by a comet 2 kilometers in diameter traveling at 30 kilometers per second (30,000 m/s).

  1. Assume that the comet has a total mass of  4.2 × 10 12 kilograms. What is its total kinetic energy? (Hint: The kinetic energy is equal to  1 2 m v 2 , where is the comet’s mass and is its speed. If you use mass in kilograms and velocity in m/s, the answer for kinetic energy will have units of joules.)
  2. Convert your answer from part a to an equivalent in megatons of TNT, the unit used for nuclear bombs. Comment on the degree of devastation the impact of such a comet could cause if it struck a populated region on Earth. (Hint: One megaton of TNT releases  4.2 × 10 15 joules of energy.)

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Chapter 12 Solutions

MODIFIED MAST ASTRONOMY:COSMIC PERSPECTI

Ch. 12 - Prob. 6EAPCh. 12 - Prob. 7EAPCh. 12 - How do we know the Kuiper belt and Oort cloud...Ch. 12 - Prob. 9EAPCh. 12 - Prob. 10EAPCh. 12 - Prob. 11EAPCh. 12 - Briefly describe the evidence suggesting that an...Ch. 12 - Prob. 13EAPCh. 12 - Prob. 14EAPCh. 12 - Prob. 15EAPCh. 12 - Prob. 16EAPCh. 12 - Prob. 17EAPCh. 12 - Prob. 18EAPCh. 12 - Prob. 19EAPCh. 12 - Prob. 20EAPCh. 12 - Prob. 21EAPCh. 12 - Prob. 22EAPCh. 12 - Prob. 23EAPCh. 12 - Prob. 24EAPCh. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - The Role of Jupiter. Suppose that Jupiter had...Ch. 12 - Prob. 41EAPCh. 12 - Prob. 42EAPCh. 12 - Comet Tails. Describe in your own words why comets...Ch. 12 - Prob. 44EAPCh. 12 - Adding Up Asteroids. It’s estimated that there are...Ch. 12 - Impact Energies. A relatively small impact crater...Ch. 12 - The “Near Miss” of Toutatis. The 5-kilometer...Ch. 12 - Prob. 50EAPCh. 12 - Comet Temperatures. Find the “no greenhouse”...Ch. 12 - Comet Dust Accumulation. A few hundred tons of...
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