The Virgo cluster
a. is the galactic cluster that contains the Milky Way.
b. is the oldest known cluster of galaxies.
c. is located at the center of the universe.
d. contains mostly spiral galaxies and very few elliptical galaxies.
e. is a rich cluster and the closest cluster of galaxies outside of the Local Group.
E
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Atomic Nucleus: In a head-on collision, an alpha particle (Z = 2) of energy 8.20 MeV bounces straight back from a nucleus of charge 80.0 e. How close were the centers of the objects at closest approach? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C, 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 2.81 × 10-14 m B. 3.39 × 10-12 m C. 6.56 × 10-15 m D. 2.17 × 10-14 m
Probably the next satellite to get turned into ring debris will be Neptune's backward moon, Triton
Indicate whether the statement is true or false
The complete cycle of lunar phases takes 29.53 days, also known as the Moon's ____________________ period
Fill in the blank(s) with correct word
In nuclear fusion,
A. many radioactive nuclei decay at once. B. the temperatures required are so high that it has never been accomplished on Earth. C. two smaller nuclei combine to form a larger nucleus. D. a large nucleus splits into smaller fragments.