Physics

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Our solar system is located about 27,000 light-years from the galactic center. How far does our ... Started by nummyann	1 Replies 101 Views	Jul 27, 2018 by connor417
Which of the following masses separates low mass stars from high mass stars? A) about 50 solar ... Started by JGIBBSON	1 Replies 108 Views	Jul 27, 2018 by dantucker
No stars are expected with masses greater than 150 times our Sun because A) they would fragment ... Started by lilldybug07	3 Replies 152 Views	Jul 27, 2018 by xMRAZ
Stars nearby to our sun have an average relative speed of about 70,000 km/hour. How fast is that in ... Started by Metfan725	1 Replies 103 Views	Jul 27, 2018 by alexisweber49
When energy is converted from one form to another, a tiny amount is inevitably lost. Indicate ... Started by shenderson6	1 Replies 61 Views	Jul 27, 2018 by Jevvish
As a solar mass protostar moves on to the main sequence, A) its surface temperature and ... Started by imowrer	1 Replies 73 Views	Jul 27, 2018 by chloejackso
Valles Marineris is a(n) A) large canyon on Mars. B) large valley on the Moon. C) huge series ... Started by jenna1	3 Replies 123 Views	Jul 27, 2018 by prumorgan
Which of the following statements about degeneracy pressure is not true? A) Degeneracy pressure ... Started by nenivikky	1 Replies 89 Views	Jul 27, 2018 by gcook
The electromagnetic force is stronger than gravity. Why is it over-powered by gravity on large ... Started by corkyiscool3328	1 Replies 130 Views	Jul 27, 2018 by mcinincha279
In the grapefruit model of the solar system, it would take a few minutes to walk from the Sun to ... Started by WhattoUnderstand	1 Replies 37 Views	Jul 27, 2018 by lkoler
What is the fate of an isolated brown dwarf? A) It will become a black hole. B) It will become a ... Started by tfester	3 Replies 136 Views	Jul 27, 2018 by ong527
A GUT (grand unified theory) refers to theories that A) unify the electromagnetic and weak ... Started by washai	1 Replies 87 Views	Jul 27, 2018 by micaelaswann
What percentage of a star's total lifetime is spent on the main sequence? A) 100 B) 50 C) 90 D) ... Started by mia	1 Replies 113 Views	Jul 27, 2018 by frejo
The Moon is slowly moving away from Earth. Indicate whether the statement is true or ... Started by tnt_battle	1 Replies 35 Views	Jul 27, 2018 by yeungji
What change slowly occurs during the main-sequence lifetime of a star? A) As hydrogen is used up ... Started by yoooooman	3 Replies 82 Views	Jul 27, 2018 by zoeyesther
Unbound orbits have more orbital energy than bound orbits. Indicate whether the statement is true ... Started by Jkov05	1 Replies 115 Views	Jul 27, 2018 by mcni194
What happens when a star like the sun exhausts its core hydrogen supply? A) Its core contracts, ... Started by segrsyd	1 Replies 113 Views	Jul 27, 2018 by amcvicar
When you experience a downward gravitational force from the Earth, the Earth experiences a weaker ... Started by Evvie72	1 Replies 115 Views	Jul 27, 2018 by wtf444
How long after the Big Bang was the Planck time, the time at which our current theories become ... Started by Capo	3 Replies 206 Views	Jul 27, 2018 by mfedorka
Compared to the star it evolved from, a red giant is A) hotter and dimmer. B) the same ... Started by mrsjacobs44	1 Replies 53 Views	Jul 27, 2018 by cam1229
Earth is always precisely 1 AU from the Sun. Indicate whether the statement is true or ... Started by anshika	1 Replies 55 Views	Jul 27, 2018 by smrerig
Planets with larger orbital radii have longer orbital periods because they both have a longer ... Started by magmichele12	1 Replies 114 Views	Jul 27, 2018 by fffftttt
The solar system is a member of a galaxy containing approximately 100 billion stars. Indicate ... Started by Alainaaa8	3 Replies 83 Views	Jul 27, 2018 by xthemafja
Why does a star grow larger after it exhausts its core hydrogen? A) The outer layers of the star ... Started by MGLQZ	1 Replies 69 Views	Jul 27, 2018 by kusterl
Which of the following planets has the least substantial atmosphere? A) Mercury B) Mars C) Earth ... Started by ap345	1 Replies 74 Views	Jul 27, 2018 by britb2u