A group of hikers hears an echo 3.60 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.)
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A group of hikers hears an echo 3.60 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.)
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- An osprey (a type of hawk) has a distinct call: a whistle at 2100 Hz. An osprey calls while diving at you — you’ve gotten too close to her nest and she wants to drive you away! The frequency you perceive is 2400 Hz. How fast is the osprey approaching? (The speed of sound in air varies with temperature, but in this problem you can take it to be 343 m/s, the speed at 20◦C.)A group of hikers hears an echo 4.20 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 341 m/s.)The driver of a car traveling 24.0 m/s sounds his horn as he approaches an intersection. If the horn has a frequency of 655 Hz, what frequency does a pedestrian hear, if she is at rest at the intersection's crosswalk? Assume a sound speed of 343 m/s.
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- A person stands at a point 300 m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before the person hears an echo? (Take the speed of sound to be 344 m/s)A group of hikers hears an echo 3.00 s after shouting. How far away is the mountain that reflected the sound wave?A group of hikers hears an echo 1.30 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 348 m/s.)