An organ pipe of length 3.0 m has one end closed. The longest and next-longest possible wavelengths for standing waves inside the pipe are
A. 6 m and 3 m.
B. 12 m and 6 m.
C. 3 m and 1.5 m.
D. 12 m and 4 m.
E. 9 m and 6 m.
Answer: D
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Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles ?1 and ?2 such that:
A.
B.
.C.
.D.
E.
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