A) Despite warnings from ECCPD, you use your homemade sonar equipment, which use

Question

A) Despite warnings from ECCPD, you use your homemade sonar equipment, which uses a frequency of 1500 Hz, to look for the mysterious force that has devastated ECC and the surrounding area ( except for Mc Donalds) If you are traveling at 7 m/s toward this mysterious force as it appears to move 4 m/s away from you, what frequency does your sonar detect from it?

B) as you get closer, you notice that it is GODZILLA!! and he sees you! and begins to come after you!! if you are now moving away at 15 m/s, and GODZILLA is chasing you at 30 m/s, what is the new frequency you detect from GODZILLA!?

Explanation / Answer

A) f' = 1500*(340+7/(340+4))

= 1513.08 Hz

B) f' = 1500*(340-15/(340-30))

= 1572.5 Hz

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