1) A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 1.85 s after the rifle was

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1 A Rifle Is Fired In A Valley With Parallel Vertical Walls The Echo From One Wall Is Heard 1 85 S After The Rifle Was 1 (36.15 KiB) Viewed 12 times

1) A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 1.85 s after the rifle was fired. The echo from the other wall is heard 2.85 s after the first echo. How wide is the valley? The velocity of sound is 340. m/s. 2) A train is moving parallel and adjacent to a highway with a constant speed of 38.0 m/s. A car is traveling in the same direction as the train at 60.0 m/s. The car's horn sounds at 450. Hz and the train's whistle sounds at 360 Hz. The speed of sound is 340. m/s. a) When the car is behind the train what frequency does an occupant of the car observe for the train whistle? b) When the car is in front of the train what frequency does a train passenger observe for the car's horn?