Connect Access Card for Integrated Science
7th Edition
ISBN: 9781259350412
Author: Bill W Tillery, Eldon Enger, Frederick C Ross
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 12, Problem 23CQ
Analyze when apparent magnitude is a better scale of star brightness and when absolute magnitude is a better scale of star brightness.
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A star has an apparent magnitude of 10.0 and an absolute magnitude of 2.5. How far away is it?
Group of answer choices
1. The relative velocities of four stars are shown in the figure below with arrows.
If an astronomer were to study the light from these four stars, in which star would the astronomer see greatest redshift of its light spectra? Hint: Think Doppler Effect
A. star 1B. star 2C. star 3D. star 4
Stars A, B, C, D, and E have apparent magnitudes of 7, 3, -1, 15, and 0, respectively.
1) Which star appears brightest to us?
2) Which appears faintest?
Chapter 12 Solutions
Connect Access Card for Integrated Science
Ch. 12.1 - Stars twinkle and planets do not twinkle because...Ch. 12.6 - Prob. 2SCCh. 12.6 - Prob. 3SCCh. 12.6 - Prob. 4SCCh. 12.6 - Prob. 5SCCh. 12.6 - Prob. 6SCCh. 12.6 - Prob. 7SCCh. 12.6 - Prob. 8SCCh. 12.7 - Prob. 9SCCh. 12.7 - Prob. 10SC
Ch. 12.7 - Prob. 11SCCh. 12.7 - Prob. 12SCCh. 12 - What is a light-year, and how is it defined?Ch. 12 - Prob. 2CQCh. 12 - Prob. 3CQCh. 12 - What is the Hertzsprung-Russell diagram?Ch. 12 - Prob. 5CQCh. 12 - Prob. 6CQCh. 12 - Prob. 7CQCh. 12 - Prob. 8CQCh. 12 - Prob. 9CQCh. 12 - Prob. 10CQCh. 12 - Prob. 11CQCh. 12 - Prob. 12CQCh. 12 - Prob. 13CQCh. 12 - Prob. 14CQCh. 12 - Prob. 15CQCh. 12 - Prob. 16CQCh. 12 - Prob. 17CQCh. 12 - Prob. 18CQCh. 12 - Prob. 19CQCh. 12 - Prob. 20CQCh. 12 - Prob. 21CQCh. 12 - Prob. 22CQCh. 12 - Analyze when apparent magnitude is a better scale...Ch. 12 - Prob. 24CQCh. 12 - Prob. 25CQCh. 12 - Prob. 1PEACh. 12 - Prob. 2PEACh. 12 - Prob. 3PEACh. 12 - Prob. 4PEACh. 12 - Prob. 5PEACh. 12 - Prob. 6PEACh. 12 - Prob. 7PEACh. 12 - Prob. 8PEACh. 12 - Prob. 9PEACh. 12 - Prob. 10PEACh. 12 - Prob. 11PEACh. 12 - Prob. 1PEBCh. 12 - Prob. 2PEBCh. 12 - Prob. 3PEBCh. 12 - Prob. 4PEBCh. 12 - Prob. 5PEBCh. 12 - Prob. 6PEBCh. 12 - Prob. 7PEBCh. 12 - Prob. 8PEBCh. 12 - Prob. 9PEBCh. 12 - Prob. 10PEBCh. 12 - Prob. 11PEB
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- An astronomer is investigating a faint star that has recently been discovered in very sensitive surveys of the sky. The star has a magnitude of 16. How much less bright is it than Antares, a star with magnitude roughly equal to 1?arrow_forwardName five characteristics of a star that can be determined by measuring its spectrum. Explain how you would use a spectrum to determine these characteristics.arrow_forwardThe lowest mass for a true star is 1/12 the mass of the Sun. What is the luminosity of such a star based upon the mass-luminosity relationship?arrow_forward
- Which of the following can you determine about a star without knowing its distance, and which can you not determine: radial velocity, temperature, apparent brightness, or luminosity? Explain.arrow_forwardThe luminosity of a star is 6.6 x 1031 W and the peak wavelength in its spectrum is 4.6 x 10-7 m. Calculate the surface area of that star. Round off the answer to 2 decimal places with scientific representation.arrow_forwardChoose the correct statements concerning spectral classes of stars. (Give ALL correct answers, i.e., B, AC, BCD...) A) Neutral hydrogen lines dominate the spectrum for stars with temperatures around 10,000 K because a lot of the hydrogen is in the n=2 level. B) Hydrogen lines are weak in type O-stars because most of it is completely ionized. C) Oh Be A Fine Guy/Girl Kiss Me, is a mnemonic for remembering spectral classes. D) The spectral sequence has recently been expanded to include L, T, and Y classes. E) K-stars are dominated by lines from ionized helium because they are so hot. F) The spectral types of stars arise primarily as a result of differences in temperature.arrow_forward
- The apparent visual magnitude of star (Rigel) is 0.12. Use the method of spectroscopic parallax to calculate the approximate distance to Rigel in units of parsecs. The absolute visual magnitude of Rigel is −6.8.arrow_forwardTwo stars in a binary system orbit around their center of mass. The centers of the two stars are 6.09x1011 m apart. The larger of the two stars has a mass of 4.24x1030 kg, and its center is 2.14x1011 m from the system's center of mass. What is the mass of the smaller star?arrow_forwardTwo stars in a binary system orbit around their center of mass. The centers of the two stars are 7.17 x 1011 m apart. The larger of the two stars has a mass of 3.70 x 1030 kg and its center is 2.08 x 1011 m from the system's center of mass. Calculate the mass of the smaller?arrow_forward
- The bright star Spica in the constellation Virgo has a surface temperature about 4.4 times that of the Sun. Its luminosity is about 20,500 times that of the Sun. Calculate Spica’s radius compared to the radius of the Sun (in units of solar radii, ?⊙).arrow_forwardWhich of the following WOULD NOT characterizes the type(s) of star we would find at g, m, n, o, and p on the Hertzsprung-Russel Diagram (Figure 4) a. are all smaller than q,i,h. b. fuse hydrogen into helium. c. are called, “the main sequence”. d. fuse He into heavier elements. e. get smaller towards the right sidearrow_forwardThe spectral type of a star is directly related to its color. Recall that a star emits light as a blackbody, which has a particular shape to its spectrum, as shown in this figure. Based on this, what basic property of a star determines its color (and thus its spectral type)? Choose one: A. age B. composition C. radius D. temperaturearrow_forward
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