The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 1, Problem 14EAP
Does it Make Sense?
Decide whether the statement makes sense (or is clearly true) or does not make sense (or is cleanly false). Explain clearly: not all of these have definitive answers, so your explanation is more important than your chosen answer.
Example: l walked east from our base camp at the North Pole.
Solution: The statement does not make sense because east has no meaning at the North Pole—all directions are south from the North Pole.
14. The universe is billions of light-years in age.
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Answer all questions in the space provided. Show ALL your steps in your calculations. Answer in complete sentences and therefore statements.
Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,
A.
Galaxy 1 must be twice as big as Galaxy 2.
B.
we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2.
C.
we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2.
D.
Galaxy 2 must be twice as old as Galaxy 1.
Hubble's First Attempt. Edwin Hubble's first attempt to measure the universe's expansion rate was flawed because the standard candles he was using were not properly calibrated. Look at (Figure 1)
a.Estimate the value of Ho corresponding to the solid line in the figure. Express your answer kilometers per second per million light-years to two significant figures.
b.What is the approximate age of the universe indicated by that erroneous value of Ho? Express your answer in years to one significant figure.
Chapter 1 Solutions
The Cosmic Perspective (9th Edition)
Ch. 1 - Prob. 1VSCCh. 1 - Prob. 2VSCCh. 1 - Prob. 3VSCCh. 1 - Prob. 4VSCCh. 1 - Prob. 1EAPCh. 1 - Define astronomical unit and light-year.Ch. 1 - Explain the statement “The farther away we look in...Ch. 1 - Prob. 4EAPCh. 1 - Prob. 5EAPCh. 1 - What do we mean when we say that the universe is...
Ch. 1 - In what sense are we “star stuff”?Ch. 1 - Use the cosmic calendar to describe how the human...Ch. 1 - Briefly explain Earth’s daily rotation and annual...Ch. 1 - Briefly describe our solar system’s location and...Ch. 1 - Prob. 11EAPCh. 1 - Prob. 12EAPCh. 1 - Prob. 13EAPCh. 1 - Does it Make Sense? Decide whether the statement...Ch. 1 - Prob. 15EAPCh. 1 - Prob. 16EAPCh. 1 - Prob. 17EAPCh. 1 - Prob. 18EAPCh. 1 - Prob. 19EAPCh. 1 - Prob. 20EAPCh. 1 - Prob. 21EAPCh. 1 - Prob. 22EAPCh. 1 - Which of the following correctly lists our ‘cosmic...Ch. 1 - An astronomical unit is (a) any planet’s average...Ch. 1 - The star Betelgeuse is about 600 light-years away....Ch. 1 - Prob. 26EAPCh. 1 - The total number of stars in the observable...Ch. 1 - Prob. 28EAPCh. 1 - Prob. 29EAPCh. 1 - Prob. 30EAPCh. 1 - Prob. 31EAPCh. 1 - Prob. 32EAPCh. 1 - Prob. 34EAPCh. 1 - Thinking About Scale. One key to success in...Ch. 1 - Prob. 36EAPCh. 1 - A Human Adventure. Astronomical discoveries...Ch. 1 - Prob. 38EAPCh. 1 - Prob. 39EAPCh. 1 - Prob. 40EAPCh. 1 - Prob. 41EAPCh. 1 - Prob. 42EAPCh. 1 - Prob. 43EAPCh. 1 - Prob. 44EAPCh. 1 - Prob. 45EAPCh. 1 - Spacecraft Communication. We use radio waves,...Ch. 1 - Prob. 47EAPCh. 1 - Prob. 48EAPCh. 1 - Prob. 49EAPCh. 1 - Driving Trips. Imagine that you could drive your...Ch. 1 - Faster Trip. Suppose you wanted to reach Alpha...Ch. 1 - Prob. 52EAPCh. 1 - Earth Rotation Speed. Mathematical Insight 1.3...Ch. 1 - Order of Magnitude Estimate. Mathematical Insight...
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