Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 2P
Answer these questions for celestial bodies at each of the following temperatures and then draw a conclusion about the relationship between temperature and wavelength of maximum intensity. What is the wavelength of maximum intensity? In which part of the
- a. 50 K
- b. 500 K
- c. 5000 K
- d. 50,000 K
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Why don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?
a.
There is no hydrogen in stars this cool.
b.
The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy.
c.
These stars are so cool that nearly all of the hydrogen atoms are in the ground state.
d.
Stars of this temperature are too cool to produce an absorption spectrum.
e.
Stars of this temperature are too hot to produce an absorption spectrum.
An astronomical unit
a.is the average distance from the Earth to the Sun.
b.is about 150 million kilometres.
c.is measured using radar signals bouncing off Venus.
d.has units of distance.
e.all of the mentioned choices.
Galileo made many discoveries. Which one of these is not attributed to him?
a.that the Moon has mountains, valleys and craters
b.that the Sun has imperfections known as sunspots
c.that four small points of light orbit the planet Jupiter
d.the invention of the telescope
e.that Venus shows a complete cycle of phases
Which one of these statements describes why the planet Venus is much warmer than Earth?
a.Venus has a denser and deeper atmosphere.
b.It is closer to the Sun than Earth.
c.It experienced a 'runaway greenhouse effect' long ago.
d.It produces more carbon dioxide than is absorbed by the surface.
e.all of the mentioned statements
H.M
1-What wavelength (in nanometers) is the peak intensity of the light coming from a star whose
surface temperature is 11,000 Kelvin? (Note: This is about twice the temperature of our Sun's
surface.)
2-Determine the surface temperature of a star whose maximum intensity is at 400nm.
Chapter 7 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQ
Ch. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - How is heat different from temperature?Ch. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - Prob. 20RQCh. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Could an object be orbiting another object and we...Ch. 7 - Prob. 24RQCh. 7 - How Do We Know? How is the macroscopic world you...Ch. 7 - Prob. 1PCh. 7 - Answer these questions for celestial bodies at...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 1SOPCh. 7 - Prob. 2SOPCh. 7 - Prob. 1LTLCh. 7 - Prob. 2LTLCh. 7 - Prob. 3LTLCh. 7 - Prob. 4LTLCh. 7 - Prob. 5LTLCh. 7 - Prob. 6LTLCh. 7 - Prob. 7LTL
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