The fact that light can be polarized shows that light is
a. polar c. an electromagnetic wave
b. monochromatic d. a transverse wave
D
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A 2000 kg car is traveling at 40.0 m/s and then puts on the brakes and comes to a complete stop. The heat generated at the brakes due to stopping heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg
What is the increase in the temperature of the brakes?
A. 66.6 
B. 75.4
C. 87.5
D. 95.6
E. 117
A board of mass m lies on the ground. What is the magnitude of the force you would have to exert to lift one end of the board barely off the ground (assuming that the other end still touches the ground)?
A. 
B. 
C. 
D. The answer depends on the board’s length.
E. Other (explain)
The study of fossils is called
a)geology. b)biology. c)paleontology. d)correlation.
The universal accelerating force could NOT be considered:
A) antigravity. B) Einstein's cosmological constant. C) dark energy. D) vacuum pressure. E) dark matter.