21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
6th Edition
ISBN: 9780393874921
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 23, Problem 4QP
To determine
The following characteristics that does not differentiate the cold and hot dark matter.
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The age of the universe can be determined if
a.
the universe is flat.
b.
the amount of dark matter in the universe can be accurately determined.
c.
the rate of recession of the galaxies in the Local Group can be accurately determined.
d.
the temperature of the cosmic background radiation can be accurately determined.
e.
the Hubble constant and density of the universe can be accurately determined.
In order to form a black hole, a star must be about how much more massive than our Sun?
a.
Fifty times as massive
b.
Ten times as massive
c.
Twice as massive
d.
Twenty times as massive
e.
It actually must be less massive than our Sun
In 1998, it was announced that the expansion of the universe is accelerating. What does this imply from the perspective of the big bang?
a.
A force exists that we knew nothing about causes the expansion.
b.
The universe must be closed.
c.
The universe is finite.
d.
The amount of dark matter must be far less than the amount of normal matter.
e.
The universe must be infinitely old.
Chapter 23 Solutions
21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
Ch. 23.1 - Prob. 23.1CYUCh. 23.2 - Prob. 23.2CYUCh. 23.3 - Prob. 23.3CYUCh. 23.4 - Prob. 23.4CYUCh. 23 - Prob. 1QPCh. 23 - Prob. 2QPCh. 23 - Prob. 3QPCh. 23 - Prob. 4QPCh. 23 - Prob. 5QPCh. 23 - Prob. 6QP
Ch. 23 - Prob. 7QPCh. 23 - Prob. 8QPCh. 23 - Prob. 9QPCh. 23 - Prob. 10QPCh. 23 - Prob. 11QPCh. 23 - Prob. 12QPCh. 23 - Prob. 13QPCh. 23 - Prob. 14QPCh. 23 - Prob. 15QPCh. 23 - Prob. 16QPCh. 23 - Prob. 17QPCh. 23 - Prob. 18QPCh. 23 - Prob. 19QPCh. 23 - Prob. 20QPCh. 23 - Prob. 21QPCh. 23 - Prob. 22QPCh. 23 - Prob. 23QPCh. 23 - Prob. 24QPCh. 23 - Prob. 25QPCh. 23 - Prob. 26QPCh. 23 - Prob. 27QPCh. 23 - Prob. 28QPCh. 23 - Prob. 29QPCh. 23 - Prob. 30QPCh. 23 - Prob. 31QPCh. 23 - Prob. 32QPCh. 23 - Prob. 33QPCh. 23 - Prob. 36QPCh. 23 - Prob. 37QPCh. 23 - Prob. 38QPCh. 23 - Prob. 45QP
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- 4. Which of the following constituents of the Universe is present in the highest fraction in terms of its contribution to the total energy of the Universe? a. Dark Matter. b. Dark Energy. c. Light. d. Normal (baryonic) matter.arrow_forwardThe peculiar system SS 433 I. is emitting beams of energy and matter. II. is producing a spectrum with both a redshift and a blueshift. III. probably contains an accretion disk. IV. is the result of a planetary nebula. a. I b. III c. II & III d. I, II, & III e. I, II, III, & IVarrow_forwardWhich of the following is most likely to yield evidence to support one of the models of the future of the universe? 1. Analysis of different types of radiation coming from the center of the Earth. 2. Analysis of asteroids in the solar system data collected from planetary missions. 3. Data collected from observing galaxies and clusters of galaxies of different ages. 4. Data collected from observing the arms of the Milky Way galaxy.arrow_forward
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