apparant freq n' = n[v-vo]/[v-vs]
vo = speed of student =0
v = 343 m/s
vs = train speed
n = real freq of train whistle
here v, vo, vs should be in same direction
approaching train>> v=o (at origin), vs = +vs (moving in
+x)
v = +343 (sound reaching student at origin)
n' = 459 = v/(v-vs) = 343*n/(343-vs)
train is receding away from origin
vo =0 (origin), vs = + vs (+x) still, v = - 343 (now sound is
coming back to origin so made -ve so that all in one
direction
n' = 434 = (-v) /[(-v) - vs] = 343*n/(343+vs)
divide
(343+vs) / (343 - vs) = 459/434
343*434 + 434 vs = 459*343 - 459vs
893 vs = 343[459-434] = 8575
vs = train = 9.6 m/s
An alert physics student stands beside the tracks as a train rolls slowly past. He notes...
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 452 Hz when the train is approaching him and 427 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 473 Hz when the train is approaching him and 456 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
An alert physics Student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 485 Hz when the train is approaching his and 458 Hz when the Crain is receding from him. Using these frequencies, he calculates the speed of the train. What value docs he finds?
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 464 Hz when the train is approaching him and 441 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
an alert physics student stands besides the tracks as a train rolls slowly past. he notes that the frequency of the train whistle is 442Hz when the train is approaching him and 414Hz when the train is receding from him. using these frequencies, he calculates the speed of the train. what value does he find? (assume the speed of sound in air is 343 m/s)
2006) Problem 4: A student knows that an ambulance siren has a frequency of,, 396 Hz. He measures, when the ambulance is approaching him, the frequency fo 417 Hz. Assume the speed of sound is 343 m/s in this problem. 33% Part (a) Input an expression for the ambulance's speed v in terms of the frequencies and the speed of sound , Grade Summary Deductions Potential10 Submissions Attempts remaining (3% per attempt) detailed view 1 2 3 0. Submit Hint...