本题目来源于试卷: Wave Basic Concepts，类别为 美国物理杯赛(Physics Bowl)
[单选题]
01.38: The S-waves (transverse) and P-wa5miwk 6h, d2gy pu8j:bves (longiyc b7n0pz 5):w+u0t 2pgttg fmtudinal) produced by earthquakes travel at different speeds through the earth. S-waves travel about 4000 m/s, P-waves travel at nearly 7000 m/s, how far away must an earthquake be for the P-waves gt7m ftgyp w2)tz0b+u0:p c5nto arrive 2 minutes before the S-waves?
A. 360 km
B. 480 km
C. 840 km
D. 1120 km
E. 1320 km
参考答案: D
本题详细解析:
暂无
| 
