Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
A. 20°
B. 60°
C. 32°
D. 64°
E. 15°
Answer: C
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Most polymers that are solid at room temperature do not mix with other polymers even when melted, because of the very high ___________of mixing.
Fill in the blank(s) with the appropriate word(s).
The sound of a bird singing is given as 5 dB. What is the intensity of the sound of a bird singing?
a. 
b. 
c. 
d. 
e. 
Tides are influenced by
a. the Moon. b. the Sun. c. the uneven surface of the Earth. d. all of the above. e. none of the above.
A particle with non-zero kinetic energy will
A. always have the same wavelength as the same energy photon. B. always have a greater wavelength than the same energy photon. C. always have a shorter wavelength than the same energy photon. D. sometimes have a greater wavelength than the same energy photon. E. sometimes have a shorter wavelength than the same energy photon.