1. In the earths crust , the propagation speed of seismic p-waves is about twice
ID: 2117851 • Letter: 1
Question
1. In the earths crust , the propagation speed of seismic p-waves is about twice that of seismic s-waves. From this fact we can conclude:
A. Nothing
B. The restoring force associated with the p-waves is greater than the restoring force associated with the s-waves
C. The restoring force associated with the p-waves is less than the restoring force associated with the s-waves
2. An organ pipe open at both ends is resonating in its fundamental mode at frequency f. If you close both ends of the pipe, the fundamental frequency will become?
A. 4f
B. 2f
C. f
D. 1/2f
E. 1/4f
Explanation / Answer
B. The restoring force associated with the p-waves is greater than the restoring force associated with the s-waves
D. 1/2f
Because For Open it is v/2L
For Closed it is v/4L
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