Four electrons move from point A to point B in a uniform electric field as shown below. Rank the electrons in diagrams I through IV by the changes in potential energy from most positive to most negative when traveling from A to B
a.
I = II = III = IV.
b.
II = III > I > IV.
c.
III > I = IV > II.
d.
II > I = IV > III.
e.
I > II = III > IV.
d
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A glider on an air track is connected by a spring to the end of the air track. If it is pulled 3.5 cm in the ?x direction away from its equilibrium point and then released from rest at t = 0, what is the initial phase 
?
A. 0
B. 
C. 
D. 
E. 
F. Some other result (specify)
A ball with original momentum +2.0 kgm/s hits a wall and bounces straight back without losing any kinetic energy. The change in momentum of the ball is:
a. 0. c. 4.0 kgm/s. b. -4.0 kgm/s. d. -8.0 kgm/s.
The central galaxy in a double-lobed radio source is usually
a. an irregular galaxy. b. a spiral galaxy. c. a dwarf elliptical galaxy. d. a giant elliptical galaxy. e. a quasar.
What is the best time to see the corona? Why is it so faint, if it is so hot?
What will be an ideal response?