The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 10, Problem 10QQ
Choose the best answer to each of the following. Explain your reasoning.
How would a flashing red light apppear as it fell into a black hole? (a) Its flashes would look the same. (b) Its flashes would appear bluer. (c) Its flashes would shift to the infrared part of the spectrum.
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Please answer the LAST THREE QUESTIONS USING THE VALUES PROVIDED. PLEASE DO NOT SKIP ANY STEPS AND COMPLETELY EXPLAIN YOUR ANSWER. I have submitted this question now FOUR times and have gotten different answers each time.
Please make sure to answer ALL question in terms of AU where appropriate!!
Please double check your work, and please make sure you fully undrestand the question before you undertake the problem.
For the given black hole, its Schwarzschild radius is
Rs=2.94814×109 m
perihelion =0.3941 AU
aphelion = 0.4927 AU
The semi-major is calculated using the formula
a = (0.492+0.3942)/2
a = 0.443 AU
The time it takes for a cloud 106,000 AU in radius
to collapse in "free-tall to form a new star is half
the time it would take for an object to orbit the star
on an extremely elliptical orbit with a semimajor
axis of 53,000 AU (half the 106.000 AU radius).
Part A
Use Kepler's third law to find the collapse time, assuming the star has the same mass as the Sun.
Express your answer in years to two significant figures.
VE ΑΣΦΑ
t=
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years
Match each characteristic below to the appropriate stellar end state.
(Select W-White dwarf, N-Neutron star, B-Black hole. If the first is W and the rest N, enter
WNNNNNNN).
A) Has a mass no greater than 1.4 solar-masses.
B) Sometimes appears as a pulsar.
C) Size defined by its Schwarzschild radius.
D) In a binary system it can explode as a supernova.
E) Supported by electron degeneracy pressure.
F) Typically about the size of Earth.
G) Usually has a very strong magnetic field.
H) Viewed from afar, time stops at its event horizon.
Answer:
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Chapter 10 Solutions
The Cosmic Perspective Fundamentals (2nd Edition)
Ch. 10 - Prob. 1QQCh. 10 - Prob. 2QQCh. 10 - Prob. 3QQCh. 10 - Prob. 4QQCh. 10 - Prob. 5QQCh. 10 - Prob. 6QQCh. 10 - Prob. 7QQCh. 10 - Choose the best answer to each of the following....Ch. 10 - Prob. 9QQCh. 10 - Choose the best answer to each of the following....
Ch. 10 - Prob. 11QQCh. 10 - Prob. 12QQCh. 10 - Explain all answers clearly, with complete...Ch. 10 - Explain all answers clearly, with complete...Ch. 10 - Prob. 15SEQCh. 10 - Prob. 16SEQCh. 10 - Prob. 17SEQCh. 10 - Prob. 18SEQCh. 10 - Prob. 19SEQCh. 10 - Explain all answers clearly, with complete...
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