COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135729458
Author: Bennett
Publisher: PEARSON
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Question
Chapter 21, Problem 53EAP
(a)
To determine
The probability of collision of star and galaxy
(b)
To determine
The probability of collision of gas clouds in two galaxies
(c)
To determine
To Compare: The probabilities of Part (a) and Part (b) and explain
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Students have asked these similar questions
What are potential solutions to the missing satellites problem (i.e. solutions that solve the problem without discarding ACDM)? (Choose 3).
O If simulations include a Galactic potential, fewer dark matter halos survive.
Many low-mass galaxies exist, but are not bright enough to be seen by current telescopes.
O Low mass galaxies merge into large galaxies and become part of their stellar halos.
O The number of low mass dark matter halos that form is lower than predictions based on cosmological initial conditions.
O lonizing photons from the first stars, galaxies or quasars heat gas until the pressure is too high to collapse into the smallest dark matter halos.
O Dwarf galaxies stream out of voids and into clusters and superclusters where they merge into larger galaxies.
In the deep space between galaxies, the number density of atoms is as low as 106 atoms/m3, and the temperature is a frigid 2.7 K.
a)What is the pressure, in pascals, in the region between galaxies?
b)What volume, in cubic meters, is occupied by 1.5 mol of gas?
c)If this volume is a cube, what is the length of one of its edges, in kilometers?
A galaxy with a spherically symmetric distribution of matter has a mass density profile of the type p(r) ∞ 1/r, where r is the radial coordinate from the centre
of the galaxy. To what type of circular velocity (r) does this correspond?
Select one:
a. (r)
O b.
c.
O d.
(r) ~ r
(r) ~ √r
(r): = constant
Chapter 21 Solutions
COSMIC PERSPECTIVE
Ch. 21 - Prob. 1VSCCh. 21 - Prob. 2VSCCh. 21 - Prob. 3VSCCh. 21 - Prob. 4VSCCh. 21 - Prob. 1EAPCh. 21 - Prob. 2EAPCh. 21 - Prob. 3EAPCh. 21 - Prob. 4EAPCh. 21 - Prob. 5EAPCh. 21 - Prob. 6EAP
Ch. 21 - Prob. 7EAPCh. 21 - Prob. 9EAPCh. 21 - Prob. 10EAPCh. 21 - Prob. 11EAPCh. 21 - Prob. 12EAPCh. 21 - Prob. 13EAPCh. 21 - Prob. 14EAPCh. 21 - Prob. 15EAPCh. 21 - Prob. 16EAPCh. 21 - Prob. 17EAPCh. 21 - Prob. 18EAPCh. 21 - Prob. 19EAPCh. 21 - Prob. 20EAPCh. 21 - Prob. 21EAPCh. 21 - Prob. 22EAPCh. 21 - Prob. 23EAPCh. 21 - Prob. 24EAPCh. 21 - Prob. 25EAPCh. 21 - Prob. 26EAPCh. 21 - Prob. 27EAPCh. 21 - Prob. 28EAPCh. 21 - Prob. 29EAPCh. 21 - Prob. 30EAPCh. 21 - Prob. 31EAPCh. 21 - Prob. 32EAPCh. 21 - Prob. 34EAPCh. 21 - Prob. 36EAPCh. 21 - Life Story of a Spiral. Imagine that you are a...Ch. 21 - Prob. 39EAPCh. 21 - Prob. 40EAPCh. 21 - Prob. 41EAPCh. 21 - Prob. 42EAPCh. 21 - Prob. 43EAPCh. 21 - Prob. 44EAPCh. 21 - Prob. 45EAPCh. 21 - Prob. 46EAPCh. 21 - Prob. 47EAPCh. 21 - A Nearby Starburst. The galaxy M82, shown in...Ch. 21 - Prob. 49EAPCh. 21 - Prob. 50EAPCh. 21 - Prob. 51EAPCh. 21 - Prob. 52EAPCh. 21 - Prob. 53EAP
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