A stone is thrown into a quiet pool of water. With no fluid friction, the amplitude of the waves falls off with distance r from the impact point as
a. 1/r3
b. 1/r2
c. 1/r3/2
d. 1/r1/2
e. 1/r
d
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Components: If a vector 
has components Ax < 0, and Ay > 0, then the angle that this vector makes with the positive x-axis must be in the range
A. 0° to 90°. B. 90° to 180°. C. 180° to 270°. D. 270° to 360°. E. It cannot be determined without additional information.
A common car engine is 20% efficient. When cruising, the car encounters an average retarding force of 1000 N. If the energy content of gasoline is 40 MJ/L, how many kilometers per liter does the car achieve?
A) 14 km/L B) 12 km/L C) 10 km/L D) 8 km/L E) none of the above
Elements in Period 2 of the periodic table have electrons in how many shells?
a. 1 b. 3 c. 4 d. 2
Which of the following best defines a sandbox?
A. A script that seems innocent, but actually has malware. B. A development environment used to create widgets. C. A web form element used for longer, memo-type entries. D. A browser feature that restricts a script from running.