Consider two seismograph stations A and B. An earthquake occurs and is registere

Question

Consider two seismograph stations A and B. An earthquake occurs and is registered by these two seismographs. The time interval between the arrival times of the P waves and the S waves is recorded at both stations, nominally tA and tB . tA = 2.0 minutes and tB = 8.0 minutes . Therefore, the distances

xA and xB from the epicenter of the earthquake to the seismographs A and B, respectively can be summarized as follows:

            a.) xA < xB

            b.) xA = xB

            c.) xA > xB

            d.) no summary is possible

20.) The transmitted frequency of a wave signal depends only upon the source of the signal. The velocity of the signal depends only upon the properties of the medium through which the wave signal is transmitted. Therefore the wavelength depends

   a.) only upon the medium

   b.) only upon the source

   c.) neither the medium or the sources

   d.) both the medium and the source

Explanation / Answer

19. option a

distance of B is more in comparision to A because time taken by wave to reach sismograph B is more

20. Option d

wavelength depends on the medium and freqquency both   

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