Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Question
Chapter 15, Problem 43Q
To determine
The length of comet’s iron tail on March 8, 1997 in kilometers and astronomical units.
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You observe a comet 0.32 AU from Earth with a tail that is 1.7 degrees long. How long is the tail in AU?
How long is the tail in kilometers?
How many times could the U.S. fit along the length of the tail? (The width of the U.S. is 4,313 km.)
Part 1 of 3
You observe a comet 0.32 AU from Earth with a tail that is 1.7 degrees long. How long is the tail in AU?
We use the small angle formula to calculate the length of the tail in AU.
arc seconds d
Ꮎ
2.06 x 105
D
Solving for the linear distance gives:
dAU = DAU
dAU =
=
AU
arc seconds
2.06 x 105
A comet’s perihelion distance is 1 AU, and its aphelion distance is 15 AU. In the following, we make a very crude calculation of the average rate of shrinkage of the comet.(a) Calculate the comet’s orbital period.(b) Estimate how many meters of ice the comet will lose each time it orbits the Sun. (Hint: To simplify the calculations, you may assume that ice sublimates off the comet’s surface during one tenth of its orbital period, that the average cometary distance over that period is 1.5 AU and the density of the cometary ice is 600 kg m−3.)
You observe a comet 0.46 AU from Earth with a tail that is 1.7 degrees long. How long is the tail in AU?
How long is the tail in kilometers?
How many times could the U.S. fit along the length of the tail? (The width of the U.S. is 4,313 km.)
Chapter 15 Solutions
Universe
Ch. 15 - Prob. 1CCCh. 15 - Prob. 2CCCh. 15 - Prob. 3CCCh. 15 - Prob. 4CCCh. 15 - Prob. 5CCCh. 15 - Prob. 6CCCh. 15 - Prob. 7CCCh. 15 - Prob. 8CCCh. 15 - Prob. 9CCCh. 15 - Prob. 10CC
Ch. 15 - Prob. 1CLCCh. 15 - Prob. 2CLCCh. 15 - Prob. 1QCh. 15 - Prob. 2QCh. 15 - Prob. 3QCh. 15 - Prob. 4QCh. 15 - Prob. 5QCh. 15 - Prob. 6QCh. 15 - Prob. 7QCh. 15 - Prob. 8QCh. 15 - Prob. 9QCh. 15 - Prob. 10QCh. 15 - Prob. 11QCh. 15 - Prob. 12QCh. 15 - Prob. 13QCh. 15 - Prob. 14QCh. 15 - Prob. 15QCh. 15 - Prob. 16QCh. 15 - Prob. 17QCh. 15 - Prob. 18QCh. 15 - Prob. 20QCh. 15 - Prob. 21QCh. 15 - Prob. 22QCh. 15 - Prob. 23QCh. 15 - Prob. 24QCh. 15 - Prob. 25QCh. 15 - Prob. 26QCh. 15 - Prob. 27QCh. 15 - Prob. 28QCh. 15 - Prob. 29QCh. 15 - Prob. 30QCh. 15 - Prob. 31QCh. 15 - Prob. 32QCh. 15 - Prob. 33QCh. 15 - Prob. 34QCh. 15 - Prob. 35QCh. 15 - Prob. 36QCh. 15 - Prob. 37QCh. 15 - Prob. 38QCh. 15 - Prob. 39QCh. 15 - Prob. 40QCh. 15 - Prob. 41QCh. 15 - Prob. 42QCh. 15 - Prob. 43QCh. 15 - Prob. 44QCh. 15 - Prob. 45QCh. 15 - Prob. 46QCh. 15 - Prob. 47QCh. 15 - Prob. 48QCh. 15 - Prob. 49QCh. 15 - Prob. 50QCh. 15 - Prob. 51QCh. 15 - Prob. 52QCh. 15 - Prob. 53QCh. 15 - Prob. 54QCh. 15 - Prob. 55QCh. 15 - Prob. 56QCh. 15 - Prob. 57QCh. 15 - Prob. 58QCh. 15 - Prob. 59QCh. 15 - Prob. 60Q
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