21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 23, Problem 6QP
To determine
The far distant future of the universe.
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As the Universe becomes older, what effect will that have on a slope of the
Hubble's diagram:
It will become steeper
It will become more shallow
It will be the same as today, just move parallel to the right
It will be completely the same as today
What is dark matter, and what evidence exists for it? What effect does dark energy have on the expansion of the universe?
Which one best explains dark matter? The resurgence of Newtonian physics or Einstein’s cosmological constant?
Chapter 23 Solutions
21st Century Astronomy
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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- If you observe light emitted from a distance object when the cosmic background temperature was Tz=54K, what is the redshift z of that light? At that redshift, what was the diameter Dz of the universe at that time compared to the diameter of today's universe D0?arrow_forwardAs the universe expands, which type of cosmic energy has a density that falls off most quickly? 1. Dark energy density 2. Dark matter density 3. Normal matter density 4. Radiation energy densityarrow_forwardAccording to the standard Big Bang theory (neglecting any effects of cosmic acceleration), what is the maximum possible age of the universe if H0 = 50 km/s/Mpc? 70 km/s/Mpc? 80 km/s/Mpc?arrow_forward
- All of the matter that we know (dark matter excluded) is made out of quarks and leptons. HINT: The electron is a type of lepton, protons and neutrons are made out of quarks. True Falsearrow_forwardWhat 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.arrow_forward
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