In: Physics

P and S waves from an earthquake travel at different speeds, and this difference helps in locating the earthquake “epicenter” (where the disturbance took place).

**(A)** If an earthquake occurs and these two waves
arrive at a particular seismic station with the P wave 2.0 min
ahead of the S wave, then how far away was the earthquake? Assume
typical speeds of 8.5 km/s and 5.5 km/s for P and S waves,
respectively.

For part A i found 1.9 x 10^3 km

**(B)** If the seismic station can determine the
distance of the epicenter from the seismic station, then how many
seismic stations are needed to locate the epicenter? (Hint: GPS
works in essentially the same manner)

Select one answer:

a. At least three seismic stations are needed.

b. At least four seismic stations are needed.

c. Only one seismic stations is needed.

d. At least two seismic stations are needed.

S and P waves from an earthquake travel at
different speeds, and this difference helps in the determination of
the earthquake "epicenter" (where the disturbance took place).
(a) Assuming typical speeds of 8.0 km/s and 5.7 km/s for
P and S waves, respectively, how far away did the
earthquake occur if a particular seismic station detects the
arrival of these two types of waves 5.0 min apart? 5947840 KM IS
INCCORECT WHAT IS THE CORRECT ANSWER?
km
(b) Is one...

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Part 2 .Orchestra instruments are commonly tuned to match an
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An earthquake P wave traveling at 7.7km/s strikes a boundary within the Earth between two kinds of material.
If it approaches the boundary at an incident angle of 44? and the angle of refraction is 33?, what is the speed in the second medium?
Express your answer to two significant figures and include the appropriate units.

what´s the difference of anarobic and aeorib pathways? Are they
different? i udnerstand that one uses oxygen and the other doesnt,
but how do they differ?

How is cluster sampling different from stratified sampling?
Explain the difference in the between and within variance of
clusters vs strata.

Life InsuranceCompare 4 different rating agencies (A.M.Best;
Fitch Ratings; Moody’s investor’s Service; Standard & Poor’s
(S&P)), please point out the pros and cons of each rating
agencies.

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