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An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter18: The Universe

Section: Chapter Questions

Problem 2AYK

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Question

In the H-R diagram we see that stellar masses__________ downward along the main sequence. At the upper end of the main sequence, the hot, luminous O stars can have masses as high as _________ or more times that of the Sun. On the lower end, cool, dim M stars may have as little as __________ times the mass of the Sun. Many more stars fall on the lower end of the main sequence than on the upper end, which tells us that _________stars are much more common than __________ stars.

luminosity (solar units)
106
105
104
10³
10²
10
-
0.1
10-²
10-3
10-4
10-5
-60M Sun
-30M Sun
Lifetime
107 yrs
O
10M Sun
Lifetime
108 yrs
30,000
B
6M Sun
Lifetime
10⁹ yrs
3M Sun
Sun-
Lifetime
1010 yrs
1.5M Sun
Lifetime
10¹1 yrs
A
F G
10,000 6000
surface temperature (K)
1M Sun
K M
0.3M Sun
0.1M Sun
3000

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