Physics

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The Earth is about 150 million km from the Sun, and the apparent brightness of the Sun in our sky is ... Started by dalyningkenk	1 Replies 70 Views	Jul 27, 2018 by braelync
Suppose that an ancient civilization had built a stone structure 6000 years ago to point towards a ... Started by mwit1967	1 Replies 71 Views	Jul 27, 2018 by catron30
Open clusters and young stars are generally found only in the disk of the Milky Way and not in the ... Started by jeatrice	1 Replies 74 Views	Jul 27, 2018 by reelove4eva
An absorption line spectrum, with dark lines crossing the rainbow of the continuum, is produced by a ... Started by haleyc112	3 Replies 150 Views	Jul 27, 2018 by Jsherida
Which of the following claims cannot be tested by science? A) The Earth was created by God. B) ... Started by Destiiny22	1 Replies 264 Views	Jul 27, 2018 by jonathanballen97
During the fusion process, mass is converted into energy. Indicate whether the statement is true ... Started by Awilson837	1 Replies 71 Views	Jul 27, 2018 by cupcake16
Outside the frost line, planetesimals could form more quickly due to the presence of both rock and ... Started by NClaborn	1 Replies 43 Views	Jul 27, 2018 by flannelavenger
Active galaxies emit most of their energy in ________ wavelengths than visible. Fill in the ... Started by michelleunicorn	3 Replies 103 Views	Jul 27, 2018 by blfontai
The Sun produces energy by fusing hydrogen into helium. Indicate whether the statement is true or ... Started by stevenposner	1 Replies 80 Views	Jul 27, 2018 by Bison
Rather than being a planet, Pluto is really just a large member of A) the Kuiper belt. B) an ... Started by SO00	1 Replies 58 Views	Jul 27, 2018 by kswal303
An emission line results from an electron falling from a higher to lower energy orbital around its ... Started by sjones	1 Replies 140 Views	Jul 27, 2018 by zenzy
In the proton-proton chain, helium atoms are fused into hydrogen. Indicate whether the statement ... Started by imanialler	3 Replies 156 Views	Jul 27, 2018 by fraziera112
Which of the following is furthest from the Sun? A) a comet in the Oort cloud B) Pluto C) an ... Started by Jkov05	1 Replies 64 Views	Jul 27, 2018 by ansleighelindsey
Einstein's theory of relativity tells us that travelers who make a high-speed trip to a distant star ... Started by serike	1 Replies 91 Views	Jul 27, 2018 by trog
Match the accomplishment to the person. A) Tycho collected data, Kepler found elliptical orbits, ... Started by drink	1 Replies 72 Views	Jul 27, 2018 by batool
What element are white dwarfs made of? Why? What will be an ideal ... Started by bobypop	3 Replies 48 Views	Jul 27, 2018 by dmurph1496
Explain why stars displaying spectral lines of molecules must be relatively cool. What will be an ... Started by big1devin	1 Replies 73 Views	Jul 27, 2018 by dajones82
Which of these gases is least abundant in our atmosphere? A) hydrogen B) nitrogen C) argon D) ... Started by P68T	1 Replies 100 Views	Jul 27, 2018 by joechoochoy
Fast-moving electrons, moving close to c, in a strong magnetic field generate ________ radiation. ... Started by TVarnum	1 Replies 152 Views	Jul 27, 2018 by leannegxo
Why are fossils of early life on Earth rarer than fossils of plants and animals from the past few ... Started by sam.t96	3 Replies 160 Views	Jul 27, 2018 by JaynaD87
The Sun is located near the edge of our galaxy, approximately 100,000 light-years from the galactic ... Started by burton19126	1 Replies 99 Views	Jul 27, 2018 by wergv
In the Bohr model of the atom, an electron can only exist in specific, well-defined energy levels. ... Started by Coya19@aol.com	1 Replies 283 Views	Jul 27, 2018 by bigsis44
The most luminous quasars can give off ________ times more light than our own Galaxy. Fill in the ... Started by rl	1 Replies 65 Views	Jul 27, 2018 by Leostella20
A possible evolutionary sequence is quasar to ________ to normal spiral galaxy. Fill in the ... Started by abarnes	3 Replies 113 Views	Jul 27, 2018 by Eazy416
Describe the ways in which Pluto is different from the terrestrial and jovian planets in the solar ... Started by frankwu	1 Replies 76 Views	Jul 27, 2018 by deja