41. An explosion occurs at the end of a pier. The sound reaches the otherend of the pier by traveling through three media: air, fresh water, and aslender metal handrail. The speeds of sound in air, water, and the handrailare 343, 1482, and 5040 m/s, respectively. The sound travels a distance of125 m in each medium. (a) Through which medium does the sound arrivefi rst, second, and third? (b) After the fi rst sound arrives, how much laterdo the second and third sounds arrive?
41. An explosion occurs at the end of a pier. The sound reaches the otherend of the pier by traveling through three media: air, fresh water, and aslender metal handrail. The speeds of sound in air, water, and the handrailare 343, 1482, and 5040 m/s, respectively. The sound travels a distance of125 m in each medium. (a) Through which medium does the sound arrivefi rst, second, and third? (b) After the fi rst sound arrives, how much laterdo the second and third sounds arrive?
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41. An explosion occurs at the end of a pier. The sound reaches the other
end of the pier by traveling through three media: air, fresh water, and a
slender metal handrail. The speeds of sound in air, water, and the handrail
are 343, 1482, and 5040 m/s, respectively. The sound travels a distance of
125 m in each medium. (a) Through which medium does the sound arrive
fi rst, second, and third? (b) After the fi rst sound arrives, how much later
do the second and third sounds arrive?
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