Physics

Replies / Views	Last post
Which star has the largest proper motion? Why? What will be an ideal ... Started by bobbie	1 Replies 65 Views	Jul 27, 2018 by gstein359
In which of the following models will the universe stop expanding? A) open universe B) critical ... Started by gonzo233	3 Replies 98 Views	Jul 27, 2018 by zacnyjessica
If Venus' clouds block much of the sunlight before it reaches the surface, why is the planet so hot? ... Started by abern	1 Replies 75 Views	Jul 27, 2018 by jonathanballen97
Interactions among galaxies also are thought to influence a galaxy's type in at least some cases. ... Started by mydiamond	1 Replies 69 Views	Jul 27, 2018 by strudel15
Which characteristic is not generally true of a starburst galaxy? A) The observed features that ... Started by cookcarl	1 Replies 57 Views	Jul 27, 2018 by nathang24
Which sequence of formation is most likely to be correct, oldest to youngest? A) globular ... Started by cmoore54	3 Replies 108 Views	Jul 27, 2018 by jamesnevil303
What role does helium play in spectral classification? What will be an ideal ... Started by student77	1 Replies 52 Views	Jul 27, 2018 by JaynaD87
The visible color of the Galactic Bulge is A) red from the emission nebulae. B) blue from the OB ... Started by KWilfred	1 Replies 68 Views	Jul 27, 2018 by Jbrasil
Mars and Mercury are similar in size, and Mercury is even denser. Why then is it Mars that has more ... Started by ssal	1 Replies 123 Views	Jul 27, 2018 by rleezy04
How are surfaces of Mercury and the Moon similar? Different? Why? What will be an ideal ... Started by bclement10	3 Replies 114 Views	Jul 27, 2018 by shewald78
What role do molecules play in spectral classification? What will be an ideal ... Started by maegan_martin	1 Replies 51 Views	Jul 27, 2018 by Zack0mack0101@yahoo.com
In the closed universe model, the geometry of spacetime in two dimensions resembles the surface of a ... Started by tfester	1 Replies 47 Views	Jul 27, 2018 by bookworm410
Why is hydrogen less obvious in B stars than in A class? What will be an ideal ... Started by vinney12	1 Replies 68 Views	Jul 27, 2018 by coreycathey
Studies from ________ led to the discovery of dark energy. A) Type II supernovae in the Large ... Started by misspop	3 Replies 63 Views	Jul 27, 2018 by Rilsmarie951
Our Moon and Mars both show very different hemispheres. Compare them and explain why this occurred ... Started by V@ndy87	1 Replies 41 Views	Jul 27, 2018 by scikid
The dark halo is now believed to extend at least A) 100,000 light-years. B) 50 kpc. C) 8 kpc. ... Started by Hungry!	1 Replies 36 Views	Jul 27, 2018 by lolol
According to the turn-off points of the oldest globular clusters, they are about A) 4.5 billion ... Started by aabwk4	1 Replies 78 Views	Jul 27, 2018 by skipfourms123
What observations suggest the mass of the Galaxy goes much farther out than its visible disc? A) ... Started by schs14	3 Replies 84 Views	Jul 27, 2018 by Danny Ewald
How does a star's luminosity relate to its radius and surface temperature? What will be an ideal ... Started by lbcchick	1 Replies 105 Views	Jul 27, 2018 by jonathanballen97
What, other than its existence, is unusual about the magnetic field of Mercury? What will be an ... Started by yoroshambo	1 Replies 70 Views	Jul 27, 2018 by huda
Which method relies on the mass of a dark object revealing its presence? A) pulsars slowing down ... Started by K@	1 Replies 71 Views	Jul 27, 2018 by JaynaD87
In the critical density universe now proposed, the ratio of dark energy to matter is about A) 1 ... Started by vinney12	3 Replies 146 Views	Jul 27, 2018 by heinisk01
The vast flood deposits prove Mars once had much running water. What happened to it? What will be ... Started by Caiter2013	1 Replies 145 Views	Jul 27, 2018 by Bigfoot1984
Contrast the atmosphere of Venus with its clouds. What will be an ideal ... Started by audragclark	1 Replies 60 Views	Jul 27, 2018 by mjbamaung
What temperature has the Big Bang cooled to by now? A) 1.4 K B) 5,800 K C) about 3,000 K D) ... Started by clmills979	1 Replies 68 Views	Jul 27, 2018 by ashely1112