Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 16, Problem 19QAP
To determine
The reason why CMB looks like the spectrum of blackbody at low temperature of
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What has occurred after the Big Bang?
Objects in the universe have reached a critical density.
Objects that were once close together have moved apart as space expanded.
Space expanded without affecting the distances between objects.
Objects that were once close together have expanded apart into already existing space.
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Which of the following did NOT happen during the first few minutes after the Big Bang?
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O two or three of the simplest elements fused together
O temperatures throughout the universe were hotter than the cores of stars are today
some very massive early stars formed
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O energy was converted to matter
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Chapter 16 Solutions
Understanding Our Universe
Ch. 16.1 - Prob. 16.1CYUCh. 16.2 - Prob. 16.2CYUCh. 16.3 - Prob. 16.3CYUCh. 16.4 - Prob. 16.4CYUCh. 16.5 - Prob. 16.5CYUCh. 16.6 - Prob. 16.6CYUCh. 16 - Prob. 1QAPCh. 16 - Prob. 2QAPCh. 16 - Prob. 3QAPCh. 16 - Prob. 4QAP
Ch. 16 - Prob. 5QAPCh. 16 - Prob. 6QAPCh. 16 - Prob. 7QAPCh. 16 - Prob. 8QAPCh. 16 - Prob. 9QAPCh. 16 - Prob. 10QAPCh. 16 - Prob. 11QAPCh. 16 - Prob. 12QAPCh. 16 - Prob. 13QAPCh. 16 - Prob. 14QAPCh. 16 - Prob. 15QAPCh. 16 - Prob. 16QAPCh. 16 - Prob. 17QAPCh. 16 - Prob. 18QAPCh. 16 - Prob. 19QAPCh. 16 - Prob. 20QAPCh. 16 - Prob. 21QAPCh. 16 - Prob. 22QAPCh. 16 - Prob. 24QAPCh. 16 - Prob. 25QAPCh. 16 - Prob. 26QAPCh. 16 - Prob. 27QAPCh. 16 - Prob. 28QAPCh. 16 - Prob. 29QAPCh. 16 - Prob. 30QAPCh. 16 - Prob. 31QAPCh. 16 - Prob. 32QAPCh. 16 - Prob. 33QAPCh. 16 - Prob. 34QAPCh. 16 - Prob. 35QAPCh. 16 - Prob. 36QAPCh. 16 - Prob. 37QAPCh. 16 - Prob. 38QAPCh. 16 - Prob. 39QAPCh. 16 - Prob. 40QAPCh. 16 - Prob. 41QAPCh. 16 - Prob. 42QAPCh. 16 - Prob. 43QAPCh. 16 - Prob. 44QAPCh. 16 - Prob. 45QAP
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- The Analysis of the Big Bang Theory.arrow_forwardThe cosmic microwave background consists of: huge clouds of dark matter interspersed with equally huge clouds of H and He enormous cold voids separating warmer filaments of young protostas and protogalaxies denser areas of slightly warmer Hydrogen mixed with slightly less dense areas of slightly cooler Helium an enormous number of photons, particles of light that emerged after the Big Bang atoms of H and He, dark matter, and an immense amount of energy MacBook Air DII DD 30 D00 000 F7 F8 F9 F4 F5 F6 & 4 8 R Yarrow_forwardAfter the Big Bang the Universe expanded and cooled. What was the temperature of the Universe when it became transparent 380,000 years after the Big Bang? Group of answer choices 100 billion K 1 billion K 10 million K 3,000 Karrow_forward
- The light coming from stars is closer to red (long wavelength, low frequency) than we would expect. What does this imply? Your answer: the universe is expanding the universe is rotating the universe is shrinking the universe is staticarrow_forwardWhat are the three important pieces of evidence that led scientists to accept the Big Bang as the most likely model for the origin of the universe?arrow_forwardDoes Hubble's Law work well for galaxies in the Local Group (such as Andromeda)? No, because dark energy is accelerating the universe's expansion over those distances. No, because we do not know the precise value of Ho. No, because Hubble did not know the Local Group existed when he discovered his law. Yes, it works well for all galaxies. No, because galaxies in the Local Group are bound gravitationally together.arrow_forward
- Place all of the following in order from earliest to the most recent: Dark energy begins acceleration of the expansion of the universe You study for your final in astronomy Last scattering of the Cosmic Microwave Background Radiation First stars and galaxies form Big Bang Universe becomes transparent (no longer opaque) aka photon decoupling time Inflationary Epoch Formation of first complex elements (hydrogen isotopes, helium & lithium)arrow_forwardThe objects that are detected at the points where the gas of a radio jet hits the extragalactic medium are called a. quasars. b. Herbig–Haro objects. c. Dyson spheres. d. hot spots.arrow_forwardExplain the evidence that supports the big bang theory.arrow_forward
- Explain the big bang theory.arrow_forwardThe cosmic "dark ages" represent that time in the history of the universe when: the inflation of a singularity in the first trillionth of a trillionth of a second of time when matter and energy were interchangeable and darkness prevailed atoms of H and He had not formed yet, so the dark ages represent the time just before the release of the cosmic microwave background dark energy came into being around 5 to 6 billion years ago, accelerating the expansion of the universe the light of the cosmic microwave background began to dim and stars and galaxies had yet to form photons of light energy were trapped within a plasma of H and He nuclei and loose electrons, creating a foggy, opaque universe MacBook Airarrow_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_forward
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