Loose Leaf For Explorations:  Introduction To Astronomy
Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 13, Problem 8TY
To determine

The white dwarfs lie on the H-R diagram is

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where do hydrogen-buring stars spend most of their time on the H-R Diagram? Is it the main sequence, the red gaint region, horizontal branch or the white dwarf region?
A main sequence star of mass, M, and radius, R, collapses to a white dwarf star with a radius 1.0% as big as the original star. If ω is the angular velocity of the original star, what is the angular velocity of the white dwarf star? Approximate the star to be a uniform solid sphere.   a. 20,000ω   b. 10,000ω   c. 50,000ω   d. 1,000ω   e. 5,000ω
Assume that when a certain main sequence star becomes a giant gas, its luminosity increases from L to 1000 L and its radius also increases from R to 1000 R. If the initial surface temperature is T, what approximately is the final surface temperature? A. 0.032 T B. 0.18 T C. 0.0010 T D. 0.010 T
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