A cluster containing a thousand or more galaxies, usually mostly ellipticals, scattered over a volume only a few Mpc in diameter is referred to as a(n) _____
A) elliptical galaxy cluster
B) irregular galaxy cluster
C) poor galaxy cluster
D) rich galaxy cluster
D
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The one object in the solar system suspected of having a semi-liquid on its surface is ____________
Fill in the blank(s) with correct word
Which one of the following is FALSE?
a) Irregular galaxies, although small, often have lots of star formation taking place in them. b) Barred spiral galaxies have similar properties to normal spirals, except for the "bar" feature. c) Galaxy collisions destroy most of the stars in the galaxies involved. d) Most galaxies appear to be receding from the Milky Way Galaxy. e) Most elliptical galaxies contain only old stars.
A car enters a 300-m radius horizontal curve on a rainy day when the coefficient of static friction between its tires and the road is 0.600. What is the maximum speed at which the car can travel around this curve without sliding?
A) 29.6 m/s B) 33.1 m/s C) 24.8 m/s D) 42.0 m/s E) 37.9 m/s
A mirror must be ________ in shape to reflect the light back to a focus
Fill in the blank(s) with correct word