Answer: lots of them
Explanation:
11. Amy is in a car that is moving at a speed of 50 kilometers/hour. If she moves a total distance of
1 answer:
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Answer:
37.545 m/s
Explanation:
f' = Actual frequency of horn = 269 Hz
f = Observed frequency of horn = 290 Hz
v = Speed of sound in air = 343 m/s
= Speed of second train = 13.7 m/s
= Speed of first train
From Doppler effect we have
The speed of the first train is 37.545 m/s