Consider the two surfaces shown below. They are both immersed in a uniform vertical electric field. (The tile vectors shown are for a typical tile on each surface.) 
For which surface is the value of 
larger?
A. The horizontal surface.
B. The tilted surface.
C. The value is the same nonzero number for both.
D. The value is zero for both surfaces.
E. One cannot compare the values from what is given.
C. The value is the same nonzero number for both.
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If the Earth were represented as a basketball (~10 in) and the Moon as a baseball (~3 in) then, to order of magnitude, what size would best represent the diameter of the Sun?
a. 10 ft b. 100 ft c. 1000 ft d. 10000 ft
Doubling the number of effective opaque layers in a planet’s atmosphere from n to 2n will make its average surface temperature increase by what factor?
A. 2 B. 21/4 C. 31/4 D. (2 + 1/n)1/4 E. [2 + 1/(n+1)]1/4 F. Some other factor (specify) T. The factor depends on the planet’s initial temperature.
A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse it has received from the gravitational force is
a. 9.80 N s. b. 19.6 N s. c. 29.4 N s. d. 58.8 N s. e. 118 N s.
The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 ?, L = 0.100 H, and C = 1.00 ?F. What are the impedance Z and the phase angle ??
a. 200 ?, ?37.0° b. 566 ?, +87.0° c. 2470 ?, ?85.4° d. 2540 ?, ?88.8° e. 393 ?, ?63.0°