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PhysicsHorizons: Exploring the Universe (MindTap Course List)Extinction dims starlight by about 1 magnitude per 1000 Pc. What fraction of photons survives a trip of 1000 pc? (Hint: Consider the definition of the magnitude scale in Reasoning with Numbers 2-1.)
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Extinction dims starlight by about 1 magnitude per 1000 Pc. What fraction of photons survives a trip of 1000 pc? (Hint: Consider the definition of the magnitude scale in Reasoning with Numbers 2-1.)

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Horizons: Exploring the Universe (...

14th Edition
Michael A. Seeds + 1 other
Publisher: Cengage Learning
ISBN: 9781305960961
BuyFind

Horizons: Exploring the Universe (...

14th Edition
Michael A. Seeds + 1 other
Publisher: Cengage Learning
ISBN: 9781305960961

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Chapter 9, Problem 1P
Textbook Problem

Extinction dims starlight by about 1 magnitude per 1000 Pc. What fraction of photons survives a trip of 1000 pc? (Hint: Consider the definition of the magnitude scale in Reasoning with Numbers 2-1.)

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Horizons: Exploring the Universe (MindTap Course List)
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Ch. 9 - Why do distant stars look redder than their...Ch. 9 - Why evidence can you cite that the interstellar...Ch. 9 - Why evidence visible to human eyes can you cite...Ch. 9 - How do the spectra of H II regions differ from the...Ch. 9 - How is the blue color of a reflection nebula...Ch. 9 - Why are interstellar lines so narrow?Ch. 9 - What factors resist the contraction of a cloud of...Ch. 9 - Explain the different ways a giant molecular cloud...Ch. 9 - How does a contracting protostar convert...Ch. 9 - What evidence is there that (a) star format ion...
Ch. 9 - How does the geometry of bipolar flows and...Ch. 9 - Describe the principle of hydrostatic equilibrium...Ch. 9 - How does the CNO cycle differ from the...Ch. 9 - How does the pressure-temperature thermostat...Ch. 9 - Step-by-step, explain how energy flows from the...Ch. 9 - Why is there a mass-luminosity relation?Ch. 9 - Why is there a lower limit to the mass of a...Ch. 9 - Why does a stars life expectancy depend on its...Ch. 9 - How Do We know? Why are scientists free to adjust...Ch. 9 - How Do We know? How can mathematical models help...Ch. 9 - In this chapter you learned about interstellar...Ch. 9 - What is your favorite home-cooked meal? In terms...Ch. 9 - Ancient astronomers, philosophers, and poets...Ch. 9 - How does hydrostatic equilibrium relate to hot-air...Ch. 9 - Extinction dims starlight by about 1 magnitude per...Ch. 9 - The density of air in a child’s balloon 20 cm in...Ch. 9 - The dust in a molecular cloud has a temperature of...Ch. 9 - A giant molecular cloud is 30 pc in diameter and...Ch. 9 - The expanding bubble of hot gas inflated by the...Ch. 9 - If a giant molecular cloud is 50 pc in diameter...Ch. 9 - If a giant molecular cloud has a mass of 1035 kg...Ch. 9 - The hottest star in the Orion Nebula has a surface...Ch. 9 - An 0 star with a lifetime of 0.5 million years...Ch. 9 - The gas in a bipolar flow can travel as fast as...Ch. 9 - If a protostellar disk is 200 AU in radius and the...Ch. 9 - If a contracting protostar is five times the...Ch. 9 - If a T Taun star is the same temperature as the...Ch. 9 - Count all of the 1H and 4He nuclei in Figure 9-15...Ch. 9 - H much energy is produced when the CNO cycle...Ch. 9 - What is the life expectancy of a 16-solar-mass...Ch. 9 - Figure UN 9-3 shows a dark globule of dusty gas....Ch. 9 - The star in Figure UN 9-4 appears to be ejecting a...

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