本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
The wavelengths of the sounds produjxxhqs: y r,8coov864sj5y a)ced by two horns are 6 m and 7 m respectiycnd op0 *;4( gqkn7ube5:z fzvely. What beat frequency is heard when the horns are so kq7 g:oz*b(;cey5fz0nu 4n dpunded on a day when the velocity of sound is 340 m/s?
A. $5 \; Hz$
B. $6 \; Hz$
C. $7 \; Hz$
D. $8 \; Hz$
参考答案: D
本题详细解析:
暂无
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