Physics

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The flatness problem states that a. the density of the Universe is very close to the critical ... Started by SO00	1 Replies 127 Views	Jul 27, 2018 by poopface
If galaxy A is four times more distant than galaxy B, then according to the Hubble law, galaxy A ... Started by panfilo	1 Replies 179 Views	Jul 27, 2018 by stillxalice
If a galaxy is located at a distance of 18 Mpc and is found to have recessional velocity of 1170 ... Started by Cooldude101	1 Replies 79 Views	Jul 27, 2018 by komodo7
Possible equations (choose the correct one): =1012/H; H=v/d. If gravity is unimportant and H equals ... Started by WhattoUnderstand	3 Replies 50 Views	Jul 27, 2018 by javimendoza7
What observational evidence supports the fact that our universe is static and unchanging? a. ... Started by c0205847	1 Replies 79 Views	Jul 27, 2018 by xMRAZ
Where did the cosmic microwave background (CMB) come from? a. photons emitted from the first ... Started by jwb375	1 Replies 84 Views	Jul 27, 2018 by Liddy
Why is the cosmic microwave background (CMB) so cold if the early Universe was so hot? a. Enough ... Started by Pineapplelove6	1 Replies 90 Views	Jul 27, 2018 by Sweetkitty24130
Astronomers have found the center of the Universe to be located in a. Earth b. the Sun c. ... Started by penguins	3 Replies 99 Views	Jul 27, 2018 by amandanbreshears
What observation has prompted astronomers to ponder the possible existence of dark energy? a. ... Started by chandani	1 Replies 87 Views	Jul 27, 2018 by C.mcnichol98
Astronomers believe that the hydrogen atoms in your body were created a. in the planets. b. ... Started by vicky	1 Replies 76 Views	Jul 27, 2018 by ryansturges
How old is the Universe since the big bang? Pick the best answer according to radioactive dating in ... Started by hbsimmons88	1 Replies 86 Views	Jul 27, 2018 by steff9894
Which of the following types of Universe has no center and no edge? a. closed b. flat c. open d. ... Started by swpotter12	3 Replies 172 Views	Jul 27, 2018 by epscape
If the Universe is truly flat, then what is the curvature and type of Universe? a. positive, open ... Started by swpotter12	1 Replies 134 Views	Jul 27, 2018 by fraziera112
The Universe contains _____________________. a. 22.7 baryonic, 4.5 WIMPs, 72.8 dark energy b. ... Started by gonzo233	1 Replies 92 Views	Jul 27, 2018 by cclemon1
How long is one Hubble time? a. 1/4 the age of the Universe b. 1/2 the age of the Universe c. ... Started by abc	1 Replies 94 Views	Jul 27, 2018 by jennafosdick
The ___________ are theories that unify the electromagnetic, weak, and strong forces at extremely ... Started by imowrer	3 Replies 113 Views	Jul 27, 2018 by anyusername12131
Observations of type Ia supernovae reveal that the expansion of the universe is speeding up because ... Started by iveyjurea	1 Replies 81 Views	Jul 27, 2018 by paavo
If in every direction we point to a star, then the conundrum that the sky is dark is known as ... Started by robinn137	1 Replies 55 Views	Jul 27, 2018 by elyse44
Antiprotons and positrons are examples of ______________, which are not ordinary matter. Fill in ... Started by fagboi	1 Replies 70 Views	Jul 27, 2018 by fur
The redshifts of the galaxies imply that the Universe is expanding and that we are at the center. ... Started by Mr3Hunna	3 Replies 111 Views	Jul 27, 2018 by akudia
Most of the elements heavier than helium were made during the first few minutes after the big bang. ... Started by KWilfred	1 Replies 103 Views	Jul 27, 2018 by Silverbeard98
If the average density of the universe is less than the critical density, the Universe is open. ... Started by jc611	1 Replies 102 Views	Jul 27, 2018 by bpool94
If the density of the universe is equal to the critical density, and H equals 50 km/s/Mpc, then the ... Started by segrsyd	1 Replies 96 Views	Jul 27, 2018 by kishoreddi
The inflationary theory of the Universe may explain why the background radiation is so isotropic. ... Started by ENagel	3 Replies 98 Views	Jul 27, 2018 by Carliemb17
The cosmic microwave background radiation was released shortly after the formation of the first ... Started by JGIBBSON	1 Replies 77 Views	Jul 27, 2018 by firehawk60