The average temperature of the typical dark dust cloud is about:
A) 0 K.
B) 2.73 K.
C) 100 K.
D) 3,000 K.
E) 6,000 K.
C
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Suppose that a bar magnet moves vertically upward toward the origin (point O), as shown below and left. 
In this situation, specify the directions of each of the vector quantities described below. Use the answer chart provided above and to the right (note that answers B and E refer to the +y and -y directions, respectively). What is the direction of 
at the origin (point O)?
A. A B. B C. C D. D E. E F. F T. Zero
When long-wavelength light is seen in the interference colors of a soap bubble, the wavelength being cancelled is relatively
A) long. B) short. C) neither of these
A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are ?s = 0.40 and ?k = 0.30, respectively
The puck's initial speed is 63 m/s. What vertical height does the puck reach above its starting point? A) 130 m B) 270 m C) 200 m D) 66 m
An eclipse season is the period of time during which the
a. moon crosses a node in its orbit. b. sun crosses a node in the moon's orbit. c. line of nodes crosses the moon's orbit. d. the moon is new or full. e. the moon is visible during the day.