Physics

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X-rays from astronomical objects can only be detected from telescopes in space. Indicate whether ... Started by LCritchfi	1 Replies 111 Views	Jul 27, 2018 by Expo
Over the course of the year, the Sun's noon altitude varies by ________ degrees. A) 45 B) 23.5 C) ... Started by Coya19@aol.com	1 Replies 45 Views	Jul 27, 2018 by ong527
Which of the following quantities is equal to the energy per second generated by the Sun's nuclear ... Started by pepyto	3 Replies 91 Views	Jul 27, 2018 by Loise Hard
The visible parts of galaxies contribute about 10 percent of the critical density of the universe. ... Started by Jipu 123	1 Replies 80 Views	Jul 27, 2018 by lauravaras
X-ray telescope mirrors are very similar to optical telescope mirrors. Indicate whether the ... Started by Zoey63294	1 Replies 88 Views	Jul 27, 2018 by ambernicolefink
Long-period comets are believed to originally come from A) the Kuiper belt. B) the Oort cloud. ... Started by AEWBW	1 Replies 88 Views	Jul 27, 2018 by ngr69
The orbits of most comets A) have perihelions within the orbits of Mercury. B) are like the ... Started by lb_gilbert	3 Replies 104 Views	Jul 27, 2018 by Carissamariew
While there are none yet, in the very distant future, most normal matter will be in the form of ... Started by Mr.Thesaxman	1 Replies 45 Views	Jul 27, 2018 by Chelseyj.hasty
Where in the Sun do fusion reactions happen? A) everywhere inside the Sun B) core and radiation ... Started by karen	1 Replies 51 Views	Jul 27, 2018 by Ahernandez18
Recent measurements of temperature fluctuations in the cosmic microwave background radiation ... Started by sheilaspns	1 Replies 132 Views	Jul 27, 2018 by fur
What causes X-ray bursters? A) The binary companion of a neutron star spirals in and combines ... Started by FButt	3 Replies 152 Views	Jul 27, 2018 by gcook
Compared to the interstellar medium, the gases in a planetary nebula will be richer in helium and ... Started by mpobi80	1 Replies 66 Views	Jul 27, 2018 by eliasc0401
When atoms of an element are heated enough that they lose electrons, their emission and absorption ... Started by melina_rosy	1 Replies 93 Views	Jul 27, 2018 by shaquita
Changing minds: From the time the idea of dark matter was first proposed in the 1930s, it took ... Started by azncindy619	1 Replies 163 Views	Jul 27, 2018 by Awesome
Which of these bodies are most likely to break up over time? A) Trojan asteroids B) jovian ... Started by SGallaher96	3 Replies 211 Views	Jul 27, 2018 by srodz
In size and density, both Io and Europa resemble A) our Moon. B) Pluto. C) Mars. D) Mercury. E) ... Started by mia	1 Replies 72 Views	Jul 27, 2018 by joewallace
Which of the following correctly describes how light will be affected as it tries to escape from a ... Started by dollx	1 Replies 48 Views	Jul 27, 2018 by maya.nigrin17@yahoo.com
The twelve constellations through which the Sun passes are signs of the ________. Fill in the ... Started by RRMR	1 Replies 53 Views	Jul 27, 2018 by Expo
Although mass transfer can occur in binary stars, the small mass change does not impact the ... Started by tingc95	3 Replies 100 Views	Jul 27, 2018 by olderstudent
Many scientists suspect that Venus has a stronger and thicker lithosphere than Earth. If this is ... Started by jhjkgdfhk	1 Replies 81 Views	Jul 27, 2018 by kescobar@64
Despite varying masses, all spiral galaxies look essentially the same. Indicate whether the ... Started by jCorn1234	1 Replies 131 Views	Jul 27, 2018 by aadams68
Which has a greater mass? A) four protons B) two neutrons and two protons in a helium nucleus ... Started by nummyann	1 Replies 167 Views	Jul 27, 2018 by morganmarie791
Unlike spirals, elliptical galaxies do not contain a flattened disk. Indicate whether the ... Started by BrownTown3	3 Replies 99 Views	Jul 27, 2018 by perkiness
Observatory construction sites: Consider the factors that go into selecting telescope construction ... Started by MirandaLo	1 Replies 67 Views	Jul 27, 2018 by kristenb95
The time interval of 365.242 days is defined as the ________. Fill in the blank(s) with correct ... Started by frankwu	1 Replies 178 Views	Jul 27, 2018 by macybarnes