Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 27, Problem 100DQ
Why is it important to have a science-based understanding of the structure of our universe? Try condensing your answer into a single philosophical sentence.
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Students have asked these similar questions
Your friends are talking about Olber's Paradox:
Friend 1: When the universe was quite young, it was also quite small, and therefore light
was trapped inside the universe. This is why we don't see light from the edge of the
universe in every direction.
Friend 2: No, Olber's Paradox describes only light from stars, not from galaxies, and why
you can't use light from distant stars to see at night.
Friend 3: You're both right and you're both wrong. The paradox concerns itself with the
expansion of the universe, and explains why light from the early universe was able to be
released.
Are any of them right, in part or in whole?
1. The current (critical) density of our universe is pe = 10-26kg/m³. Assume the universe is
filled with cubes with equal size that each contain one person of m = 100kg. What would
the length of the side of such a cube have to be in order to give the correct critical density?
How many hydrogen atoms would you need in a box of 1 m³ to reach the critical density?
The matter we know, which consists mostly of hydrogen, constitutes only 4.8% of the current
critical energy density of our universe. So how many hydrogen atoms are actually in a box
of 1 m3 in our universe? Deep space is very empty and a much better vacuum than we can
obtain on earth in a laboratory.
Another explanation for the Universe is the Steady State Hypothesis. The Steady State Hypothesis says that the Universe has always existed and is infinite in extent. Which of the following supports the Big Bang Theory and which supports the Steady State Model.
(Select B-Big Bang Theory, S-Steady State Model, If the first is B and the rest S, enter BSSSSS).
A) An observation that some globular clusters show M-type stars that have evolved off the main sequence.
B) The measurement of redshifts that show galaxies appear to be moving away from each other and the Universe is expanding.
C) A measurement that shows the density of the Universe is close to the critical density.
D) The measurement of the microwave background radiation.
E) Observing that galaxies at very large distances look identical to those in the nearby universe.
Chapter 27 Solutions
Conceptual Physical Science (6th Edition)
Ch. 27 - What are constellations?Ch. 27 - Why does an observer at a given location see one...Ch. 27 - Prob. 3RCQCh. 27 - Is the light-year a measurement of time or...Ch. 27 - Prob. 5RCQCh. 27 - Prob. 6RCQCh. 27 - What is an H-R diagram?Ch. 27 - Prob. 8RCQCh. 27 - Prob. 9RCQCh. 27 - Prob. 10RCQ
Ch. 27 - Prob. 11RCQCh. 27 - Prob. 12RCQCh. 27 - Prob. 13RCQCh. 27 - Prob. 14RCQCh. 27 - Prob. 15RCQCh. 27 - Prob. 16RCQCh. 27 - Prob. 17RCQCh. 27 - Prob. 18RCQCh. 27 - Prob. 19RCQCh. 27 - Why dont we think the Sun will eventually become a...Ch. 27 - How does the mass of a star before its collapse...Ch. 27 - If black holes are invisible, what is the evidence...Ch. 27 - Prob. 23RCQCh. 27 - What type of galaxy is the Milky Way?Ch. 27 - What are the consequences of galaxies colliding?Ch. 27 - What is a starburst galaxy?Ch. 27 - Prob. 27RCQCh. 27 - How many spiral galaxies are in the Local Group?Ch. 27 - Is the Local Group a relatively small or large...Ch. 27 - Prob. 30RCQCh. 27 - Prob. 34TASCh. 27 - The brightest star in the sky, Sirius, is about 8...Ch. 27 - If you were to travel straight up from the core of...Ch. 27 - Prob. 37TASCh. 27 - Prob. 38TASCh. 27 - Prob. 39TASCh. 27 - Prob. 40TARCh. 27 - Prob. 41TARCh. 27 - Prob. 42TARCh. 27 - Prob. 43TARCh. 27 - Rank the nuclear fuels in order of being consumed,...Ch. 27 - Prob. 45TARCh. 27 - Rank in order of increasing size: (a) solar...Ch. 27 - The 19th-century author and social commentator...Ch. 27 - Prob. 48ECh. 27 - On the Moon, stars other than the Sun can be seen...Ch. 27 - Which figure in this chapter best shows that a...Ch. 27 - We see the constellations as distinct groups of...Ch. 27 - Prob. 52ECh. 27 - Which moves faster from horizon to horizon: the...Ch. 27 - Prob. 54ECh. 27 - Why does the Big Dipper change its position in the...Ch. 27 - Prob. 56ECh. 27 - Prob. 57ECh. 27 - Prob. 58ECh. 27 - Why dont we see the ultraviolet color of stars?Ch. 27 - Does a blue star contain yellow light?Ch. 27 - Does a yellow star contain blue light?Ch. 27 - Prob. 62ECh. 27 - Prob. 63ECh. 27 - Prob. 64ECh. 27 - Prob. 65ECh. 27 - Prob. 66ECh. 27 - Prob. 67ECh. 27 - Prob. 68ECh. 27 - Prob. 69ECh. 27 - Prob. 70ECh. 27 - Prob. 71ECh. 27 - Prob. 72ECh. 27 - Prob. 73ECh. 27 - Prob. 74ECh. 27 - Prob. 75ECh. 27 - What evidence suggests that our Sun is a...Ch. 27 - Prob. 77ECh. 27 - Prob. 78ECh. 27 - Prob. 79ECh. 27 - Prob. 80ECh. 27 - Prob. 81ECh. 27 - Prob. 82ECh. 27 - Prob. 83ECh. 27 - Prob. 84ECh. 27 - Prob. 85ECh. 27 - Prob. 86ECh. 27 - Prob. 87ECh. 27 - What is the difference between a black hole's...Ch. 27 - Prob. 89ECh. 27 - Prob. 90ECh. 27 - Prob. 91ECh. 27 - Are there galaxies other than the Milky Way that...Ch. 27 - Prob. 93ECh. 27 - Prob. 94ECh. 27 - Draw an analogy between a galaxy and a forest.Ch. 27 - Draw an analogy between a galaxy and a swarm of...Ch. 27 - Compare and contrast astronomy and astrology.Ch. 27 - Project what human civilization would be like if...Ch. 27 - Prob. 99DQCh. 27 - Why is it important to have a science-based...Ch. 27 - Choose the BEST answer to each of the following....Ch. 27 - Prob. 2RATCh. 27 - The star nearest Earth is (a) Proxima Centauri....Ch. 27 - Prob. 4RATCh. 27 - Prob. 5RATCh. 27 - Prob. 6RATCh. 27 - Prob. 7RATCh. 27 - A black hole is (a) an empty region of space with...Ch. 27 - Prob. 9RATCh. 27 - Prob. 10RAT
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