An earthquake emits both S-waves and P-waves which travel at ...

[go.lag]

An earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?
 a. 88.9 km
  b. 1 200 km
  c. 675 km
  d. 240 km
  e. 480 km

Question 2

(Do not try the following: it could kill you. This question is only about a hypothetical possibility.) If you were standing below an object emitting a fixed frequency sound falling at terminal velocity, as it approached you, you would hear the sound
 a. drop in frequency.
  b. stay at the same frequency.
  c. increase in frequency.
  d. decrease in loudness.
  e. stay at the same loudness.

[phuda]

Answer to Question 1

C

Answer to Question 2

B

[go.lag]

Thank you!

[phuda]

Always glad to help...