本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
On a day when the speed ofjxte0.+co( 1remxy2kutfw p:+ a zo5) sound in air io,q;diu :k c74gln/p ss 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s lat :/ qsonui,7kdcg pl;4er. How far away was the object that reflected back the sound?
A. $4.25 \; m$
B. $8.50 \; m$
C. $0.425 \; m$
D. $0.850 \; m$
参考答案: A
本题详细解析:
暂无
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