Earth's axis would remain pointed constantly toward a spot near the star Polaris except for the effect of _____
A) revolution
B) conjunction
C) eccentricity
D) precession
D
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Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° north of east. Vector 
has a magnitude of 4.0 m and points 30° west of north. The resultant vector 
+ 
is given by
A. 9.8 m at an angle of 64° east of north. B. 9.8 m at an angle of 26° north of east. C. 7.2 m at an angle of 26° east of north. D. 3.3 m at an angle of 26° north of east. E. 3.3 m at an angle of 64° east of north.
Aberration: Which of the following statements are correct? (There could be more than one correct choice.)
A. Spherical aberration, but not chromatic aberration, occurs for lenses. B. Chromatic aberration, but not spherical aberration, occurs for lenses. C. Both chromatic aberration and spherical aberration occur for lenses. D. Both chromatic aberration and spherical aberration occur for spherical mirrors.
Rita accelerates a 0.40-kg ball from rest to 12 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick?
a. 48 N c. 24 N b. 32 N d. 64 N
The applied magnetic field that it is necessary to reduce the intensity of magnetization of a ferromagnetic material to zero after saturation in the forward direction is the _________field.
Fill in the blank(s) with the appropriate word(s).