Multiple Choice
Situation 15.1
A train is approaching a signal tower at a speed of 40 m/s.The train engineer sounds the 1000 Hz whistle and a switchman in the tower responds by sounding the 1200 Hz siren.The air is still and the speed of sound is 340 m/s.
-In Situation 15.1,the frequency of the tower siren tone,heard by the engineer,in SI units,is closest to:
A) 1200
B) 300/340 × 1200
C) 340/300 × 1200
D) 340/380 × 1200
E) 380/340 × 1200
Correct Answer:
Verified
Correct Answer:
Verified
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