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 of sound in air isbw9*spd w ozn. 1;t,jfoe 9rg0 340 m/s, a s:a r0ih. gp+gypysms58:an5bat emits a shriek whose echo reaches it 0.0250 s later. How 5h:+5 :n p0 gymas.ssai8rygp 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
| 
