Earthquakes can produce three types of waves. One of these is a
transverse wave called an S wave. A
typical S wave travels at 500m/s. Its
wavelength is about 420 meters.
What is its frequency?
A. 1.19 Hz. Perpendicular
B. 0.84 Hz, Perpendicular
C. 1.19 Hz, Parallel
D. 0.84 Hz, Parallel

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers