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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Chapter 27, Problem 80E
To determine
Why do nuclear fusion reactions not occur on the outer layers of stars.
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QUESTION 16
Use the figure shown below to complete the following statement: A low-mass protostar (0.5 to 8M the mass compared to our sun) remains roughly constant in
decreases in
until it makes a turn towards the main sequence, as it follows its evolutionary track.
Protostars of different masses follow diferent
paths on their way to the main sequence.
107
Luminosity (L)
10
105
10
107
10²
101
1
10-1
10-2
10-3
Spectral
type
0.01 R
0.001
Re
60 M
MAIN SEQUENCE
40,000 30,000
20 Mau
10 Mgun
5 Mun
0.1 Run
Ren
radius; temperature
luminosity; radius
3 Min.
05 BO
temperature; luminosity
Oluminosity: temperature
radius: luminosity
1 M
10,000 6000
Surlace temperature (K)
1,000 Rs
2 M STAR
L
0.8 M
B5 AO FOGO КБ МБ
-10
+10
3000
Absolute visual magnitude
and
The sun will eventually cease fusing nuclei in it interior and will then be dead what general term is used to describe dead but still illuminus stars when the star becomes such a star name two kinds of of nuclei that are expected to dominate its core as a result of the nuclear fusion that has taken place prior to its death
A red giant star might have radius = 104 times the solar radius,
and luminosity = 1730 times solar luminosity.
Use the data given below to calculate the temperature
at the surface of the red giant star.
Data:
solar radius R = 7 x 108 meters
solar luminosity L = 4 x 1026 watts
Stefan-Boltzmann constant
a = 5.67 x 10-8 W m² K-4
(in K)
A: 1226 OB: 1434 OC: 1678 OD: 1963 OE: 2297 OF: 2688 OG: 3145 OH: 3679
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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- You have discovered two star clusters. The first cluster contains mainly main-sequence stars, along with some red giant stars and a few white dwarfs. The second cluster also contains mainly main-sequence stars, along with some red giant stars, and a few neutron stars-but no white dwarf stars. What are the relative ages of the clusters? How did you determine your answer?arrow_forwardWhy does a star's life expectancy depend on its mass?arrow_forwardWhat are the two main nuclear chains known in stars and what are they responsible for? What are the differences between both? Don't copy from Google i need unique answerarrow_forward
- What is the heaviest element likely to be produced in fusion processes in stars?arrow_forwardThe mass-luminosity relation describes the mathematical relationship between luminosity and mass for main sequence stars. It describes how a star with a mass of 4 M⊙ would have a luminosity of ______ L⊙. If a star has a radius 1/2 that of the Sun and a temperature 4 that of the Sun, how many times higher is the star's luminosity than that of the Sun? (If it is smaller by a factor of 8, you would write 0.125 because 1/8=0.125) If a star has a radius 2 times larger than the Sun's and a luminosity 1/4th that of the Sun, how many times higher is the star's temperature than that of the Sun? (If it is smaller by a factor of 8, you would write 0.125 because 1/8=0.125) If a star has a surface temperature 2 times lower than the Sun's and a luminosity the same as the Sun, how many times larger is the star than the Sun? (If it is smaller by a factor of 8, you would write 0.125 because 1/8=0.125)arrow_forwardWhat are the main products of the fusion reactions that take place in low mass main sequence stars?arrow_forward
- Do you think that nuclear fusion takes place in the atmospheres of stars? Why or why not?arrow_forwardThe text says a star does not change its mass very much during the course of its main-sequence lifetime. While it is on the main sequence, a star converts about 10% of the hydrogen initially present into helium (remember it’s only the core of the star that is hot enough for fusion). Look in earlier chapters to find out what percentage of the hydrogen mass involved in fusion is lost because it is converted to energy. By how much does the mass of the whole star change as a result of fusion? Were we correct to say that the mass of a star does not change significantly while it is on the main sequence?arrow_forwardAccording to the text, a star must be hotter than about 25,000 K to produce an H II region. Both the hottest white dwarfs and main-sequence O stars have temperatures hotter than 25,000 K. Which type of star can ionize more hydrogen? Why?arrow_forward
- Are supergiant stars also extremely massive? Explain the reasoning behind your answer.arrow_forwardHow do the two types of supernovae discussed in this chapter differ? What kind of star gives rise to each type?arrow_forwardIn which of these star groups would you mostly likely find the least heavy-element abundance for the stars within them: open clusters, globular clusters, or associations?arrow_forward
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