A merger between a small elliptical galaxy and a large spiral galaxy will most likely result in:
A) a large elliptical.
B) a large spiral.
C) a small elliptical and a large elliptical.
D) a small elliptical and a large spiral.
E) a small spiral and a large elliptical.
B
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What is the primary form of evidence that has led astronomers to conclude that the expansion of the universe is accelerating?
A) observations of the speeds of individual galaxies in clusters B) measurements of how galaxy speeds away from the Milky Way have increased during the past century C) observations of white dwarf supernovae D) measurements of the rotation curve for the universe
A sound source of 150 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is
A. 0.389 
B. 0.403
C. 0.582
D. 0.746
E. 0.927
Ball A is thrown up and Ball B is thrown down, both with the same initial speed. Neglecting air resistance, just prior to hitting the ground, which of the following is true?
1.You cannot tell which has the greater speed because it depends on the value of the initial speed. 2.Ball A's speed is greater than Ball B's speed. 3.They have the same speed. 4.Ball B's speed is greater than Ball A's speed.
A convex mirror will allow you to see large areas normally hidden from your view
a. True b. False Indicate whether the statement is true or false