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sat2声学thesoundofasirentothewestofyouistransmittedtoyourearbyairthatisa)vibratinginanorth-southdirectionb)vibratinginawest-eastdirectionc)vibratinginverticaldirectiond)movingcontinuouslywestwarde)movingcontinu
题目详情
sat2 声学
the sound of a siren to the west of you is transmitted to your ear by air that is
a) vibrating in a north-south direction
b) vibrating in a west-east direction
c) vibrating in vertical direction
d) moving continuously westward
e) moving continuously eastward
the sound of a siren to the west of you is transmitted to your ear by air that is
a) vibrating in a north-south direction
b) vibrating in a west-east direction
c) vibrating in vertical direction
d) moving continuously westward
e) moving continuously eastward
▼优质解答
答案和解析
汽笛声的声源在你的西边,当然他应该是向四面八方扩散,但要传到你的耳朵里当然是沿着东西方向传播,而且声音是靠空气的振动来传播的,这样一看就是b比较符合了
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