Different colors of light correspond to different light
A) velocities.
B) intensities.
C) polarities.
D) frequencies.
E) none of the above
Answer: D
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Which of the following is true of ancient constellations?
A) Out of all the ancient constellations, over 150 constellations are still in use. B) Ancient constellations were a grouping of bright and fainter stars. C) Ancient constellation boundaries, when they were defined at all, were only approximate. D) All the regions of the northern and southern sky were identified as constellations by ancient astronomers.
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 south. The resultant vector 
+ 
is given by
A. 2.7 m at an angle of 8.3° south of east. B. 2.7 m at an angle of 8.3° east of south. C. 3.2 m at an angle of 8.3° east of south. D. 3.2 m at an angle of 8.3° south of east. E. 2.3 m at an angle of 8.3° south of east.
How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?
What will be an ideal response?
If a metal had a Fermi level of 5.0 eV, what would be the average energy of the electrons at 0 K?
A) 8.0 eV B) 6.0 eV C) 3.0 eV D) 0 E) 5.0 eV