本题目来源于试卷: stationary wave in tube，类别为 美国物理杯赛(Physics Bowl)
[单选题]
09.06: For a standing wave mode oo jn)d9,9fy v.3vwobun a oe7+me m*h uxworbfg /:i ,:d6string fixed at both ends, adjacent antinodes are separated by a distance of 20 cm. Waves travel on this string at a speed of 1200 cm/s. At what frequency is the string vibrated t:bw: ,u*m oxmheogr+6/e f di7o produce this standing wave?
A. 120 Hz
B. 60 Hz
C. 40 Hz
D. 30 Hz
E. 20 Hz
参考答案: D
本题详细解析:
暂无
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