Physics

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The radiation era lasted for only the first few billion years of the Big Bang. Indicate whether ... Started by segrsyd	3 Replies 79 Views	Jul 27, 2018 by cuttiesgirl16
Why would observing in blue light give better resolution than red light when observing objects close ... Started by maegan_martin	1 Replies 103 Views	Jul 27, 2018 by uniquea123
Most of the mass of our galaxy lies between Earth and the Galactic center. Indicate whether the ... Started by EY67	1 Replies 70 Views	Jul 27, 2018 by Bison
To find the ________ velocity, we must combine proper motion and parallax data. Fill in the ... Started by rachel9	1 Replies 63 Views	Jul 27, 2018 by dominiqueenicolee
Between us and the Galactic Center lie about 100 billion solar masses. Indicate whether the ... Started by nmorano1	3 Replies 72 Views	Jul 27, 2018 by itsakadoozi
If a star has a parallax of .005, then its distance is ________ light-years. Fill in the blank(s) ... Started by penza	1 Replies 112 Views	Jul 27, 2018 by stallen
What are adaptive optics designed to overcome? How is this done? What will be an ideal ... Started by jazziefee	1 Replies 62 Views	Jul 27, 2018 by billybob123
Of normal matter, about 25 of it by mass is still primordial helium even today. Indicate whether ... Started by Bob-Dole	1 Replies 74 Views	Jul 27, 2018 by bd5255
The absolute magnitude scale is defined so that a difference of five magnitudes is a luminosity ... Started by justinmsk	3 Replies 91 Views	Jul 27, 2018 by akpaschal
Telescopes designed to study the earliest stages in galactic lives should be optimized for ... Started by schs14	1 Replies 50 Views	Jul 27, 2018 by mohan
The carbon in your DNA was fused in the first few minutes of the Big Bang. Indicate whether the ... Started by daltonest1984	1 Replies 66 Views	Jul 27, 2018 by juliaf
The 3 K background radiation is just the redshifted gamma wavelength radiation of the decoupling. ... Started by Davideckstein7	1 Replies 178 Views	Jul 27, 2018 by cadimas
The Sgr A black hole may contain three million solar masses. Indicate whether the statement is ... Started by eruditmonkey@yahoo.com	3 Replies 92 Views	Jul 27, 2018 by mfedorka
During the epoch of decoupling, nuclei and electrons combined to form atoms. Indicate whether the ... Started by Sportsfan2111	1 Replies 68 Views	Jul 27, 2018 by lindahyatt42
In structure, our Milky Way is most similar to A) the Orion nebula. B) M31, the Andromeda ... Started by Charlie	1 Replies 72 Views	Jul 27, 2018 by Sophiapenny
Decoupling refers to the separation of matter and antimatter during inflation. Indicate whether ... Started by schs14	1 Replies 60 Views	Jul 27, 2018 by kingfahad97
The absolute magnitude of a star is how bright it appears if viewed from a distance of ________ ... Started by mrsjacobs44	3 Replies 94 Views	Jul 27, 2018 by deja
Carbon dioxide dominates the atmospheres of Venus and Mars, but on Earth most of it lies underground ... Started by Pineappleeh	1 Replies 77 Views	Jul 27, 2018 by hanadaa
A star with an apparent magnitude of +2.3 and an absolute magnitude of +5.9 lies ________ than 10 ... Started by 809779	1 Replies 63 Views	Jul 27, 2018 by AngeliqueG
The ALH84001 meteorite, discovered in Antarctica, came from ________, and suggests it may once have ... Started by Sportsfan2111	1 Replies 72 Views	Jul 27, 2018 by Kaytorgator
The majority of dark matter is normal protons and neutrons. Indicate whether the statement is ... Started by APUS57	3 Replies 93 Views	Jul 27, 2018 by Hdosisshsbshs
Two stars are both spectral type K2V; if the closer is magnitude +3.7, and the fainter is magnitude ... Started by mckennatimberlake	1 Replies 52 Views	Jul 27, 2018 by nekcihc358
The greatest rift valley system yet found is ________ on Mars. Fill in the blank(s) with correct ... Started by future617RT	1 Replies 74 Views	Jul 27, 2018 by lindahyatt42
The RR Lyrae stars all have periods of A) less than a second. B) several minutes. C) several ... Started by neverstopbelieb	1 Replies 68 Views	Jul 27, 2018 by aliotak
While ________ gas is the main atmospheric component of both Mars and Venus, its density means it ... Started by fnuegbu	3 Replies 52 Views	Jul 27, 2018 by emily12345