UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 23, Problem 50Q
To determine
The distribution of dark matter according to the given 3-D figure.
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Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe. Use the value of H0 = 0.07×103 kms-1/Mpc to estimate the Universe’s age. Comment on the significance of your answer.
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Chapter 23 Solutions
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
Ch. 23 - Prob. 1CCCh. 23 - Prob. 2CCCh. 23 - Prob. 3CCCh. 23 - Prob. 4CCCh. 23 - Prob. 5CCCh. 23 - Prob. 6CCCh. 23 - Prob. 7CCCh. 23 - Prob. 8CCCh. 23 - Prob. 9CCCh. 23 - Prob. 10CC
Ch. 23 - Prob. 11CCCh. 23 - Prob. 12CCCh. 23 - Prob. 13CCCh. 23 - Prob. 14CCCh. 23 - Prob. 15CCCh. 23 - Prob. 16CCCh. 23 - Prob. 17CCCh. 23 - Prob. 18CCCh. 23 - Prob. 19CCCh. 23 - Prob. 20CCCh. 23 - Prob. 1CLCCh. 23 - Prob. 2CLCCh. 23 - Prob. 1QCh. 23 - Prob. 2QCh. 23 - Prob. 3QCh. 23 - Prob. 4QCh. 23 - Prob. 5QCh. 23 - Prob. 6QCh. 23 - Prob. 7QCh. 23 - Prob. 8QCh. 23 - Prob. 9QCh. 23 - Prob. 10QCh. 23 - Prob. 11QCh. 23 - Prob. 12QCh. 23 - Prob. 13QCh. 23 - Prob. 14QCh. 23 - Prob. 15QCh. 23 - Prob. 16QCh. 23 - Prob. 17QCh. 23 - Prob. 18QCh. 23 - Prob. 19QCh. 23 - Prob. 20QCh. 23 - Prob. 21QCh. 23 - Prob. 22QCh. 23 - Prob. 23QCh. 23 - Prob. 24QCh. 23 - Prob. 25QCh. 23 - Prob. 26QCh. 23 - Prob. 27QCh. 23 - Prob. 28QCh. 23 - Prob. 29QCh. 23 - Prob. 30QCh. 23 - Prob. 31QCh. 23 - Prob. 32QCh. 23 - Prob. 33QCh. 23 - Prob. 34QCh. 23 - Prob. 35QCh. 23 - Prob. 36QCh. 23 - Prob. 37QCh. 23 - Prob. 38QCh. 23 - Prob. 39QCh. 23 - Prob. 40QCh. 23 - Prob. 41QCh. 23 - Prob. 42QCh. 23 - Prob. 43QCh. 23 - Prob. 44QCh. 23 - Prob. 45QCh. 23 - Prob. 46QCh. 23 - Prob. 47QCh. 23 - Prob. 48QCh. 23 - Prob. 49QCh. 23 - Prob. 50QCh. 23 - Prob. 51QCh. 23 - Prob. 52QCh. 23 - Prob. 53QCh. 23 - Prob. 54QCh. 23 - Prob. 55QCh. 23 - Prob. 56QCh. 23 - Prob. 57Q
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- Suppose a hypothetical universe is expanding (at some moment in time) at a rate of H. At this same moment the density of this Universe is ρ. (a) Confirm for yourself that this is a closed universe, given the values below. (b) Determine, and enter below, the spatial radius of curvature for this closed universe (at the same moment in time at which the values above are given). Values: H = 56 km s-1 Mpc-1 ρ = 4.9x10-25 kg m-3 Give your answer for (b) in units of Mpc, to the nearest integer (not in scientific notation - e.g., 1234).arrow_forwardWhat is the redshift z of a galaxy 172 Mpc away from us? Note: Assume a value of the Hubble constant of 71.1 km/s/Mpc Round your answer to three decimal places.arrow_forwardAs a mass m of gas falls into a black hole, at most 0.1mc2 is likely to emerge as radiation; the rest is swallowed by the black hole. Show the Eddington luminosity for a black hole of mass M is equivalent to 2*10-9 Mc2yr-1. Explain why we expect the black hole's mass to grow by at least a factor of e every 5*107 years. Where Edding Luminicity is defined as LE=(4piGMmpc)/(sigmaT), where G is the gravitational constant, M is the mass of the black hole, mp is the mass of a proton, c is the speed of light, and sigmaT is Thomson scattering where sigmaT=6.653*10-25 cm2.arrow_forward
- The first picture is some background information need help answering the first question about the escape velocity from the andromeda Galaxyarrow_forwardThe Andromeda Galaxy is a member of the Local Group of galaxies. It is approaching us. Does this mean that the Hubble Law is wrong? Why or why not? Explain.arrow_forwardHow does the lighthouse model explain pulsars? in two sentences.arrow_forward
- Why is the cosmic microwave background radiation evidence for a hot Big Bang?arrow_forwardThe galaxy NGC 87 has been observed to be moving away from Earth at a speed of 3,420 km/s.Using a value of 20.8 km/s/Mly for the value of the Hubble constant, find the distance between NGC 87 and Earth. Give your answer to the nearest Mpc.arrow_forwardBriefly explain the young Helmholtz theory.arrow_forward
- Describe the evidence indicating that a black hole may be at the center of our Galaxy.arrow_forwardIt is possible to derive the age of the universe given the value of the Hubble constant and the distance to a galaxy, again with the assumption that the value of the Hubble constant has not changed since the Big Bang. Consider a galaxy at a distance of 400 million light-years receding from us at a velocity, v. If the Hubble constant is 20 km/s per million light-years, what is its velocity? How long ago was that galaxy right next door to our own Galaxy if it has always been receding at its present rate? Express your answer in years. Since the universe began when all galaxies were very close together, this number is a rough estimate for the age of the universe.arrow_forward
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