Physics

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The cosmological redshifts of galaxies are Doppler shifts. a. True b. False Indicate whether ... Started by appyboo	1 Replies 100 Views	Jul 27, 2018 by jharrington11
All dark matter in our Universe falls into the category of hot dark matter. a. True b. False ... Started by Coya19@aol.com	1 Replies 150 Views	Jul 27, 2018 by lorealeza77
Normal matter is baryonic. a. True b. False Indicate whether the statement is true or ... Started by ericka1	1 Replies 100 Views	Jul 27, 2018 by dpost18
The expansion of the Universe is accelerating. a. True b. False Indicate whether the statement ... Started by folubunmi	3 Replies 138 Views	Jul 27, 2018 by popopong
In the early universe, the electromagnetic and strong nuclear forces were joined together to make ... Started by ETearle	1 Replies 116 Views	Jul 27, 2018 by akemokai
Dark energy accounts for about 70 of the critical density of the Universe. a. True b. False ... Started by Destiiny22	1 Replies 81 Views	Jul 27, 2018 by bigcheese9
The decoupling of the strong force from the electroweak force provided energy for a rapid inflation ... Started by danielfitts88	1 Replies 61 Views	Jul 27, 2018 by Edwyer
Olber's paradox states that the ____. a. Universe must have a center, but not an edge b. sky ... Started by mpobi80	3 Replies 92 Views	Jul 27, 2018 by leahm14
The Universe has____. a. an edge, does not have a center, and is finite b. no edge, does not ... Started by saraeharris	1 Replies 96 Views	Jul 27, 2018 by kalskdjl1212
The proper interpretation of the Hubble law (which relates the redshift of a galaxy to its distance) ... Started by james	1 Replies 137 Views	Jul 27, 2018 by EAN94
The Hubble time is____. a. an estimate of the age of the Universe b. the time needed for a galaxy ... Started by Davideckstein7	1 Replies 98 Views	Jul 27, 2018 by robbielu01
Hot gas created during the big bang should be detectable becausethe ____. a. gas has traveled ... Started by saraeharris	3 Replies 65 Views	Jul 27, 2018 by shewald78
Arno Penzias and Robert Wilson are famous for____. a. creating the first microwave telescope b. ... Started by ericka1	1 Replies 61 Views	Jul 27, 2018 by brittiany.barnes
The microwave emission detected by Arno Penzias and Robert Wilson fits a blackbody spectrum with a ... Started by D2AR0N	1 Replies 70 Views	Jul 27, 2018 by dlook33
Penzias and Wilson detected microwave radiation because the big bang created ____. a. shorter ... Started by mspears3	1 Replies 62 Views	Jul 27, 2018 by moormoney
In the very first phase after the big bang, when the Universe was about a microsecond old, space was ... Started by RRMR	3 Replies 82 Views	Jul 27, 2018 by cegalasso
During one phase of the big bang, gamma ray photons were creating electrons and positrons ... Started by Destiiny22	1 Replies 89 Views	Jul 27, 2018 by djpooyouma
Einstein's mass-energy equivalence () is important to the first phases of the big bang in explaining ... Started by viki	1 Replies 92 Views	Jul 27, 2018 by atrochim
The big bang only created hydrogen and helium (with miniscule amounts of lithium) because____. a. ... Started by go.lag	1 Replies 77 Views	Jul 27, 2018 by huda
The cosmic microwave background radiation was emitted during a time when ____ was the important ... Started by sjones	3 Replies 91 Views	Jul 27, 2018 by tuwy
The proper interpretation of a what a galaxy's redshift measures is ____. a. its motion in space ... Started by melina_rosy	1 Replies 108 Views	Jul 27, 2018 by durant1234
Modern observations have shown that the geometry of the Universe is ____. a. flat, and the ... Started by gbarreiro	1 Replies 121 Views	Jul 27, 2018 by alexanderhamilton
The main criterion for deciding between Universe geometries is ____. a. density b. mass c. ... Started by jon_i	1 Replies 77 Views	Jul 27, 2018 by Zack0mack0101@yahoo.com
Which statement about the behavior of Universe geometries is correct? a. Closed and open ... Started by charchew	3 Replies 67 Views	Jul 27, 2018 by milbourne11
Ordinary matter makes up approximately ____percent of the critical density of the Universe. a. ... Started by TVarnum	1 Replies 62 Views	Jul 27, 2018 by al