21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 21.2, Problem 21.2CYU
To determine
The location where big bang takes place.
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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.
Current evidence suggests that the universe is
a.
flat, infinite, and neither expanding nor contracting.
b.
closed, finite, and slowing its expansion.
c.
open, infinite, and slowing its expansion.
d.
open, finite, and accelerating its expansion.
e.
flat, infinite, and accelerating its expansion.
The big bang happened
a.
in the Hyades cluster.
b.
in the Virgo cluster.
c.
in the Sagittarius spiral arm.
d.
in the Andromeda Galaxy.
e.
in all of these locations.
Chapter 21 Solutions
21st Century Astronomy
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- The type of universe in which the average density is predicted to be greatest is the a. open universe. b. flat universe. c. closed universe. d. negatively curved universe.arrow_forwardIf our universe is expanding, what are the implications for the separation between two stars within our galaxy? A. The two stars are moving farther apart. B. The two stars are moving closer together. C. The distance between the two stars is unaffected. D. The question is impossible to answer without more information.arrow_forwardTheory predicts that the irregularities in the hot gas of the big bang should be how many degrees in diameter if the universe is flat? a. 0.01 degree b. 1 degree c. 5 degrees d. 10 degrees e. 20 degreesarrow_forward
- If 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_forwardIf the Hubble constant equals 70 km/s/Mpc, the age of the universe roughly equals a. 6 billion years. b. 10 billion years. c. 12 billion years. d. 14 billion years. e. 20 billion years.arrow_forwardThe assumption of isotropy states that a. the universe looks the same at all epochs. b. the universe looks the same from all locations over sufficiently great distances. c. the universe looks the same in all directions over sufficiently great distances. d. all of the above are true. e. none of the above are true.arrow_forward
- In a Universe with Ω=1, without the presence of dark energy, the expansion of the Universe would a. remain constant over time b. slow down over time c. reverse and then collapse d. speed up over timearrow_forwardHow does the age of the universe relate to the Hubble constant? a. The smaller the constant, the older the universe. b. The larger the constant, the older the universe. c. The Hubble constant is the age of the universe. d. The Hubble constant is the square of the universe. e. It is impossible to tell the age of the universe from the Hubble constant.arrow_forward21. Which of the following represents the notion that our observable Universe may be a part of a much larger whole? a. Big Bang Nucleosynthesis. b. Solar System. c. Galaxy. d. Multiverse.arrow_forward
- What happens when galaxies collide? A. Star collisions will be rare but the shapes of the galaxies will be largely distorted. B. The shapes of the galaxies will be largely distorted and many of the stars of one galaxy will collide with stars of the other galaxy. C. The shapes of the galaxies will be distorted and many stars will collide with stars of the other galaxy, as well as with other stars in the same galaxy. D. Star collisions will be rare and the two galaxies will just pass through each other without any changes. Is the answer A? Thank you!arrow_forwardThe cosmic background radiation comes from a time in the evolution of the universe a. when protons and neutrons were first formed. b. when the big bang first began to expand. c. that is known as the inflationary period. d. when gamma rays had enough energy to destroy nuclei. e. when electrons began to recombine with nuclei to form atoms.arrow_forwardWe know that dark matter must exist in galaxies. If not, many of the stars in a galaxy would ... a.Expand and go supernova due to the expansion of the Universe b.Fly away from the galaxy because the stars’ velocities are so large, and the galaxy would not have enough gravity to hold onto them c.Orbit the center of the galaxy normally d.Spiral in toward the center of the galaxy because most of the galaxy’s mass would be toward the centerarrow_forward
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