A diver, below the surface of a lake, notices that no light appears to be coming toward her greater than the angle 
measured from the vertical. If the index of refraction of water is 1.33, what is the angle 
A. 
B. 
C. 
D. 
E. 
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 basketball player can jump 1.6 m off the hardwood floor. With what upward velocity did he leave the floor?
a. 5.8 m/s b. 2.8 m/s c. 5.4 m/s d. 5.6 m/s e. 11 m/s
A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
a. 22 V b. 19 V c. 16 V d. 25 V e. 12 V
A tsunami is unlike most other water waves mainly because it
A) is stronger. B) has a very long wavelength. C) moves very fast. D) is energetic.