Question

1. In seismology, the S wave is a transverse wave. As an S wave travels through...

1. In seismology, the S wave is a transverse wave. As an S wave travels through the Earth, the relative motion between the S wave and the particles is

Select one:

a. first parallel, then perpendicular.

b. perpendicular.

c. parallel.

d. first perpendicular, then parallel.

2. What is the velocity of a sound wave when the air temperature is 33 0C?

Select one:

a. 311 m/s

b. 319 m/s

c. 343 m/s

d. 351 m/s

3. A simple harmonic oscillator can be described by the following equation:

x(t) = 2.7 m cos (11.5t +28)

What is its period in sec.?

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