Double-lobed radio galaxies are____
a. spiral galaxies with unusually luminous nuclei
b. elliptical galaxies with very broad emission lines
c. explained by the double-exhaust model
d. extremely luminous objects with high redshifts
e. glowing green gases due to excitation from energy from an active core
c
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The angular separation of two stars is 0.1 arcseconds and you photograph them with a telescope that has an angular resolution of 1 arcsecond. What will you see?
A) The photo will seem to show only one star rather than two. B) The two stars will appear to be touching, looking rather like a small dumbbell. C) The stars will not show up at all in your photograph. D) You will see two distinct stars in your photograph.
The theory that inflation occurred in the early universe is incompatible with the theory of relativity
Indicate whether the statement is true or false
An object in uniform circular motion has
a. constant acceleration. b. variable radial distances. c. constant velocity. d. constant speed.
A sound wave in water has an intensity of
The density of water is 
and the velocity of sound in water is 1,482 m/s. The pressure amplitude of the sound wave is
A. 
B. 
C. 
D. 
E. 