21st Century Astronomy: The Solar System (Sixth Edition)
6th Edition
ISBN: 9780393691283
Author: Laura Kay; Stacy Palen; George Blumenthal
Publisher: W. W. Norton
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Chapter 21, Problem 6QP
To determine
The predictions of Big Bang theory.
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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.
10.
In most models for the early universe, which was the first force to have frozen out of the original Supersymmetric force?
a.
Weak Nuclear Force.
b.
Strong Nuclear Force.
c.
Gravity.
d.
Electromagnetism.
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 21 Solutions
21st Century Astronomy: The Solar System (Sixth Edition)
Ch. 21.1 - Prob. 21.1CYUCh. 21.2 - Prob. 21.2CYUCh. 21.3 - Prob. 21.3ACYUCh. 21.3 - Prob. 21.3BCYUCh. 21.4 - Prob. 21.4CYUCh. 21 - Prob. 1QPCh. 21 - Prob. 2QPCh. 21 - Prob. 3QPCh. 21 - Prob. 4QPCh. 21 - Prob. 5QP
Ch. 21 - Prob. 6QPCh. 21 - Prob. 7QPCh. 21 - Prob. 8QPCh. 21 - Prob. 9QPCh. 21 - Prob. 10QPCh. 21 - Prob. 11QPCh. 21 - Prob. 12QPCh. 21 - Prob. 13QPCh. 21 - Prob. 14QPCh. 21 - Prob. 15QPCh. 21 - Prob. 16QPCh. 21 - Prob. 17QPCh. 21 - Prob. 18QPCh. 21 - Prob. 19QPCh. 21 - Prob. 20QPCh. 21 - Prob. 21QPCh. 21 - Prob. 23QPCh. 21 - Prob. 24QPCh. 21 - Prob. 25QPCh. 21 - Prob. 26QPCh. 21 - Prob. 27QPCh. 21 - Prob. 28QPCh. 21 - Prob. 29QPCh. 21 - Prob. 30QPCh. 21 - Prob. 31QPCh. 21 - Prob. 32QPCh. 21 - Prob. 33QPCh. 21 - Prob. 34QPCh. 21 - Prob. 35QPCh. 21 - Prob. 36QPCh. 21 - Prob. 37QPCh. 21 - Prob. 38QPCh. 21 - Prob. 39QPCh. 21 - Prob. 40QPCh. 21 - Prob. 41QPCh. 21 - Prob. 42QPCh. 21 - Prob. 43QPCh. 21 - Prob. 44QPCh. 21 - Prob. 45QP
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- What are the largest known structures in the Universe?arrow_forwardIf the universe is closed and finite, then a. the universe has a center and an edge. b. the universe will expand forever. c. the final fate of the universe will be very cold and of extremely low density. d. the space-time of the universe is negatively curved. e. none of the above are true.arrow_forwardGalaxy seeds around which galaxies, clusters, and walls grew may have been a. caused by hot dark matter. b. caused by baryons. c. the result of the separation of the electromagnetic and weak forces. d. the result of freezing water molecules shortly after the universe became transparent to photons. e. caused by microscopic random fluctuations in the infant universe.arrow_forward
- The density of the universe is a. equal to the critical density if the universe is closed. b. equal to the critical density if the universe is flat. c. greater than the critical density if the universe is flat. d. greater than the critical density if the universe is open. e. none of the above.arrow_forwardWhat strong evidence found in the mid-1960s led to wide acceptance of the big bang theory of the universe? a. the discovery of antimatter b. the discovery of neutrinos c. the discovery of Cepheids as standard candles d. the discovery of the cosmic background radiation e. the discovery of the 21 cm radiation for neutral hydrogenarrow_forwardWhat did Einstein call his greatest blunder? a. introducing a cosmological constant to his equations to balance gravity. b. not believing the evidence that supported quantum mechanics. c. developing the special theory of relativity. d. not studying math and science earlier in school. e. none of the abovearrow_forward
- 1. Which of these is true about the Big Bang model? a. The singularity is an established, well-defined part of the model. b. Cosmic expansion stopped at some point in time. c. Part of its proof is the amounts of H and He we have in the universe today. d. The Big Bang was a big explosion that threw matter into many different directionsarrow_forwardIn the standard model, about when after the Big Bang did the universe become transparent to radiation? O a.10:35 , O b.10435 O C:3x 105 y O d.103 sarrow_forward4. 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_forward
- In the context of the Big Bang theory, cosmic inflation refers to: A. A rapid expansion of the universe in its early stages. B. The steady increase in the temperature of the universe. C. The formation of galaxies from primordial gas clouds. D. The eventual collapse of the universe.arrow_forwardWhat was the temperature of the universe when the recombination took place that produced the cosmic background radiation we observe today? a. about 2.7 K b. about 300 K c. about 3000 K d. about 3 million K e. about 3 billion Karrow_forwardThe first evidence for the dark energy was that: a. the cosmic microwave background spectrum was a perfect black body. b. Einstein’s theory of gravity predicted that the Universe should collapse. c. Type Ia supernovae appeared dimmer than predicted by Hubble’s law. d. Cepheid variable stars showed that galaxies were farther away that thought. e. galaxies in clusters are moving too rapidly for the clusters to be bound.arrow_forward
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