Of the possible statements that parallel rays are brought to a focus by a 1) concave mirror, 2) convex mirror, 3) converging lens, 4) diverging lens, the correct answer is
a. 1 and 2.
b. 3 and 4.
c. 1 and 3.
d. 2 and 3.
e. 2 and 4.
C
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What is the approximate latitude of the observer in the diagram below?
a.
20° N
b.
20° S
c.
70° N
d.
70° S
e.
0°
Light with ? = 590 nm enters a Michelson interferometer. How many fringes traverse the field of view if the mirror of one arm of the interferometer is moved 0.44 mm?
A) 1066 B) 1812 C) 2004 D) 1776 E) 1492
Entropy: An ideal gas undergoes an isothermal expansion. During this process, its entropy
A. decreases. B. remains unchanged. C. increases. D. cannot be predicted from the data given.
A runner starts from rest and with an acceleration of 1.0 
travels a distance of 10 meters. The time it takes the runner to cover the distance is
A. 6.3 s. B. 5.7 s. C. 5.0 s. D. 4.5 s. E. 3.8 s.