Physics

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Pluto is visible to the naked eye on extremely dark nights. Indicate whether the statement is ... Started by sam.t96	1 Replies 62 Views	Jul 27, 2018 by cupcake16
Observationally, how can we tell the difference between a white-dwarf supernova and a massive-star ... Started by P68T	1 Replies 157 Views	Jul 27, 2018 by johnpizzaz
Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of ... Started by saraeharris	1 Replies 148 Views	Jul 27, 2018 by frankwu0507
In July 2011, the Dawn probe entered orbit around A) the comet Wild. B) the asteroid Ida. C) ... Started by tichca	3 Replies 98 Views	Jul 27, 2018 by kjohnson
Imagine you are plunging into the Sun, starting from Earth. Briefly describe what you will ... Started by karlynnae	1 Replies 64 Views	Jul 27, 2018 by Jody Vaughn
After a massive-star supernova, what is left behind? A) always a white dwarf B) always a black ... Started by sabina	1 Replies 95 Views	Jul 27, 2018 by xiaomengxian
A star system may undergo two or more nova outbursts. Indicate whether the statement is true or ... Started by stevenposner	1 Replies 51 Views	Jul 27, 2018 by sailorcrescent
A galaxy with a lot of dark matter would have a high mass-to-light ratio compared to the Sun. ... Started by Wadzanai	3 Replies 110 Views	Jul 27, 2018 by asdfasdf
Why does the Milky Way appear as a band of light in the sky? What will be an ideal ... Started by biggirl4568	1 Replies 63 Views	Jul 27, 2018 by swimkari
If the universe is accelerating, it will expand forever. Indicate whether the statement is true ... Started by audie	1 Replies 98 Views	Jul 27, 2018 by trampas
Any object moving relative to Earth will have a Doppler shift when viewed from Earth. Indicate ... Started by bobbie	1 Replies 261 Views	Jul 27, 2018 by thall411
Our Sun will never become hot enough for carbon nuclei to fuse. Indicate whether the statement is ... Started by Haya94	3 Replies 81 Views	Jul 27, 2018 by guyanai
Iron meteorites are believed to come from A) the core of a differentiated asteroid, now broken ... Started by kwoodring	1 Replies 55 Views	Jul 27, 2018 by jamesnevil303
List at least two ways the sunspot cycle affects us on the Earth. What will be an ideal ... Started by Collmarie	1 Replies 62 Views	Jul 27, 2018 by moormoney
The density of white dwarf stars is about a million times that of the Sun. Indicate whether the ... Started by CharlieWard	1 Replies 108 Views	Jul 27, 2018 by enass
Because of its small size, the surface of Pluto was found by New Horizons to be old and geologically ... Started by lracut11	3 Replies 601 Views	Jul 27, 2018 by vickyvicksss
Briefly explain why sunspots are cooler than surrounding regions of the Sun, and why they look dark ... Started by mrsjacobs44	1 Replies 134 Views	Jul 27, 2018 by momolu
Suppose that Earth's atmosphere had no greenhouse gases. Then Earth's average surface temperature ... Started by Jipu 123	1 Replies 199 Views	Jul 27, 2018 by miss.ashley
The nova event is created by the helium flash. Indicate whether the statement is true or ... Started by Arii_bell	1 Replies 96 Views	Jul 27, 2018 by shaikhs
Most of the Moon's surface is densely covered with craters, but we find relatively few craters ... Started by mrsjacobs44	3 Replies 187 Views	Jul 27, 2018 by aburgess
Imagine nuclear fusion suddenly ceases in the Sun's core. How long would it take for us to discover ... Started by jake	1 Replies 101 Views	Jul 27, 2018 by anyusername12131
Meteorites are important because A) some come from the Moon and Mars, as well as the asteroid ... Started by audragclark	1 Replies 71 Views	Jul 27, 2018 by vboyd24
Which of the Galilean moons is densest and most geologically active? A) Europa B) Titan C) ... Started by erika	1 Replies 78 Views	Jul 27, 2018 by kaillie
Today the majority of the mass of the universe is already in the form of black dwarfs, the solution ... Started by Bob-Dole	3 Replies 65 Views	Jul 27, 2018 by allisonblackmore
If the Moon is on the ecliptic, new, and at its farthest distance from Earth, we will get a(n) ... Started by joesmith1212	1 Replies 67 Views	Jul 27, 2018 by apple