gc textbook chapter 12 Sound (id: adee33e8c)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
A science museum has a displaylc ;d8hqogs**wn: 7he2qmfl - call*kln0g uosll-q d8ro38l mv9k 3k. jbo(h:o7w ed a sewer pipe symphony. It consists of many plastic pipes of various lengths, which are open on bml ol3kowok8:d3* nbo8.(l7g jrk l9shv0uq -oth ends.
(a) If the pipes have lengths of 3.0 m, 2.5 m, 2.0 m, 1.5 m and 1.0 m, what frequencies will be heard by a visitor’s ear placed near the ends of the pipes?
$f_{3.0}$ =    Hz
$f_{2.5}$ =    Hz
$f_{2.0}$ =    Hz
$f_{1.5}$ $\approx$    Hz (Round to the nearest integer)
$f_{1.0}$ $\approx$    Hz (Round to the nearest integer)
(b) Why does this display work better on a noisy day than on a quiet day?

参考答案:
空格1: 57±2%  空格2: 69±2%  空格3: 86±2%  空格4: 110±2%  空格5: 170±2% 


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