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An up quark has charge 23 a down quark has charge 13

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30.An up quark has charge +2/3, a down quark has charge -1/3, and a strange quarkhas charge -1/3. The Delta-particle is formed by a combination of three downquarks. What is its charge?A) -1/3B) +1/3
C) -1D) 1E) 0Points Earned:2.0/2.0Correct Answer(s):C
31.Which of the following areas have the most massive black holes (those with the highest masses)?Points Earned:2.0/2.0
32.How might dark matter particles be discovered?Points Earned:2.0/2.0
33.A standard candle is
Points Earned:2.0/2.0
34.Which one of the following is TRUE?A) Most galaxies appear to be approaching the Milky Way Galaxy.B) Galaxy collisions destroy most of the stars in the galaxies involved.C) Most elliptical galaxies contain only young stars.D) Irregular galaxies rarely have star formation taking place in them.E) There is a supermassive black hole in the center of the Milky Way GalaxyCorrect Answer(s):EPoints Earned:2.0/2.0
35.If light takes 4 billion years to reach us from a distantgalaxy, how much further away is the distant galaxy thanthe Andromeda galaxy which is 2 million light years away?Points Earned:2.0/2.0
36.Why are there dark lines in the spiral arms of the Whirlpool Galaxy?Points Earned:2.0/2.0

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Term
Spring
Professor
WANG
Tags
Correct Answer

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