Physics

Replies / Views	Last post
The resolution of Olbers's paradox suggests that it gets dark at night because a. the Universe is ... Started by yoroshambo	3 Replies 90 Views	Jul 27, 2018 by mistyjohnson
The assumption of isotropy states that a. the Universe looks the same at all epochs. b. the ... Started by ap345	1 Replies 56 Views	Jul 27, 2018 by kilada
The assumption of homogeneity states that a. the Universe looks the same at all epochs. b. the ... Started by melina_rosy	1 Replies 57 Views	Jul 27, 2018 by ttt030911
Dark energy is the name of the a. force that lead to the inflationary period of the Universe. b. ... Started by Marty	1 Replies 54 Views	Jul 27, 2018 by jaykayy05
During the first moments of the big bang when elements could be created, nuclear fusion reactions ... Started by chads108	3 Replies 88 Views	Jul 27, 2018 by yuyiding
The Hubble time is a. the time it takes a galaxy moving at 1000 km/s to move 1 Mpc. b. the time ... Started by littleanan	1 Replies 160 Views	Jul 27, 2018 by srodz
The ___________ view of the Universe is that it is eternal and unchanging. a. inflationary b. ... Started by savannahhooper	1 Replies 93 Views	Jul 27, 2018 by catron30
When a proton and an antiproton collide a. they destroy each other and produce energy in the form ... Started by captainjonesify	1 Replies 84 Views	Jul 27, 2018 by jsm54321
As the Universe cooled, it eventually reached a temperature of 3,000 K and protons were able to ... Started by lb_gilbert	3 Replies 178 Views	Jul 27, 2018 by princessflame2016
The cosmological principle states that the Universe is I. expanding. II. accelerating. III. ... Started by theo	1 Replies 73 Views	Jul 27, 2018 by Carliemb17
Space-time will be flat if a. the Universe is expanding. b. the Universe is accelerating. c. ... Started by Beheh	1 Replies 147 Views	Jul 27, 2018 by s.meritte
Current observations indicate that the amount of baryonic matter and dark matter in the Universe ... Started by Shelles	1 Replies 195 Views	Jul 27, 2018 by billybob123
If gravity alone acts to retard the expansion and nothing acts to accelerate it, the Universe is ... Started by KWilfred	3 Replies 92 Views	Jul 27, 2018 by paavo
If the Universe is closed, then its age will be a. less than two-thirds of 1/H. b. more than ... Started by asan beg	1 Replies 70 Views	Jul 27, 2018 by Kdiggy
If the Universe is closed and finite, then a. the Universe will expand forever. b. the Universe ... Started by xclash	1 Replies 142 Views	Jul 27, 2018 by raenoj
What was the temperature of the Universe when the recombination took place that produced the cosmic ... Started by Alygatorr01285	1 Replies 78 Views	Jul 27, 2018 by Briannahope
In the late 1990's, it was announced that the expansion of the Universe is accelerating. What does ... Started by rosent76	3 Replies 88 Views	Jul 27, 2018 by jointhecircus
In the late 1990's, it was discovered from distances of ___________ in distant galaxies that the ... Started by robinn137	1 Replies 81 Views	Jul 27, 2018 by Sassygurl126
Measured ages of globular clusters suggests that the Universe is about a. 1.4 billion years old. ... Started by CharlieWard	1 Replies 76 Views	Jul 27, 2018 by stillxalice
The cosmic background radiation comes from a time a. when protons and neutrons were first formed. ... Started by abc	1 Replies 61 Views	Jul 27, 2018 by harveenkau8139
The flatness problem and horizon problem a. are solved if there was a sudden inflation of the ... Started by altibaby	3 Replies 152 Views	Jul 27, 2018 by chreslie
Seeds around which galaxies, clusters and walls grew may have been ___________ before inflation and ... Started by Destiiny22	1 Replies 54 Views	Jul 27, 2018 by debra928
Whether the Universe is open, closed or flat depends, on the ___________ of the Universe. a. ... Started by Zoey63294	1 Replies 115 Views	Jul 27, 2018 by LegendaryAnswers
Current evidence suggests that the Universe is a. flat, infinite, and neither expanding nor ... Started by iveyjurea	1 Replies 222 Views	Jul 27, 2018 by Benayers
The density of the Universe is a. equal to the critical density if the Universe is closed. b. ... Started by olgavictoria	3 Replies 125 Views	Jul 27, 2018 by kalskdjl1212