What is the ratio of the time for the capacitor in an RC series circuit to reach 90% of capacity from an empty state, to that for the circuit to discharge from a ‘full’ state to 90% capacity?
A. 9 times as long
B. 1/9 as long
C. The same time is required
D. 1/22 times as long
E. Answer depends on the particular values of R and C.
F. 22 times as long
F. 22 times as long
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If an irrotational vortex approximates the air flow in a tornado, the highest possible velocity, assuming an incompressible flow with patm = 100 kPa, is nearest:
(A) 400 m/s (B) 350 m/s (C) 300 m/s (D) 250 m/s
If a pizza radiates more energy than it absorbs, its temperature
A) decreases. B) is unaffected. C) increases. D) none of the above
Physically, why is a gas molecule’s speed v more likely to be near vp than near zero?
A. There are fewer quantum states with smaller speeds than larger speeds.
B. The Boltzmann factor has a larger value near v = vp than near v = 0.
C. We know that 
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers, along the line joining them, at a constant speed of 2.8 m/s
What beat frequency do you observe? The speed of sound in the room is 330 m/s. A) 13 Hz B) 431 Hz C) 26 Hz D) 4.7 Hz E) 118 Hz