Standing Sound Waves: Consider a pipe of length L that is open at both ends. What are the wavelengths of the three lowest-pitch tones produced by this pipe?
A. 4L, 2L, L
B. 2L, L, L/2
C. 2L, L, 2L/3
D. 4L, 4L/3, 4L/5
Answer: C
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Neptune may have more atmospheric activity than Uranus because it:
A) lacks an inclined magnetic field. B) contains 1.5 times less methane. C) has minimal cloud formations. D) has more heat flowing out of its interior.
The example shown is a(n) ______ website structure.
A. linear/tutorial B. hierarchical C. webbed D. random
Three resistors of resistances 4.0 ?, 6.0 ?, and 10 ? are connected in parallel. If this combination is now connected in series with an ideal 12-V battery and a 2.0-? resistor, what is the current through the 10-? resistor?
A) 0.59 A B) 2.7 A C) 11 A D) 16 A
A square smooth conduit, 80 cm on a side, circulates 35°C air in a large building. The pressure drop over a 50-m length of the horizontal conduit is not to exceed 800 Pa. Assume an average pressure in the conduit of 120 kPa. The maximum flow rate in the conduit is nearest:
