What statement below best describes the refraction of light?
a. The absorption of light as it travels through a dense, transparent material.
b. The spreading out of white light according to wavelength.
c. The change in direction of a light ray as it passes to a medium of different optical density.
d. The change in direction of a ray of light as it reflects off a surface.
c
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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° east of north. The resultant vector 
+ 
is given by
A. 0.70 m at an angle of 42° north of east. B. 14 m at an angle of 42° north of east. C. 1.1 m at an angle of 42° north of east. D. 9.7 m at an angle of 42° north of east. E. 2.0 m at an angle of 42° north of east.
A blob of clay, mass M, is propelled upward from a spring that is initially compressed by an amount d. If, upon its release, the clay reaches an ultimate height of h above the unstretched spring’s end, what is the spring constant k?
a. 
b. 
c. 
d. 
Open clusters are found in the ________ of our Milky Way Galaxy
Fill in the blank(s) with correct word
Warm humid air is characteristic of a
A) maritime polar air mass. B) continental polar air mass. C) maritime tropical air mass. D) continental tropical air mass.