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Does a police cars frequency

Billy wanted to write a ratio of the number of police cars in the parking lot. there were 3 police cars and one truck he wrote
1. 1 answer
2. asked by Jay
3. 524 views
Does a police cars frequency become higher moving toward a stationary observer or away from? I am confused as to how we hear the
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2. asked by Colton
3. 393 views
A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police
1. 2 answers
2. asked by Brit
3. 4,269 views
Man stands out on the street with a frequency meter. A police car drives by with the sirens on and the frequency of the sounds
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2. asked by Physics: Doppler Effect ?
3. 474 views
A speeding car is pulling away from a police car. The police car is moving at 30 m/s. The radar gun in the police car emits an
1. 2 answers
2. asked by Liz
3. 1,480 views
Two cars are A and B moving in same direction at a speed of 25m/s and 20m/s respectively if a both car is blowing there horn at
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2. asked by Kinfe Michael Tarku
3. 336 views
A police car siren emits a sound wave with a frequency fs = 400 Hz and it is moving toward the wall at 25 /m/s. What frequency
1. 2 answers
2. asked by Thomas
3. 1,534 views
a car, moving at 100 mi/hr, passes a stationary police car whose siren has a frequency of 500 Hz. what is the frequency change
1. 1 answer
2. asked by OMAR
3. 2,850 views
Two cars have identical horns, each emitting a frequency of f= 395 hz. One of the cars is moving with a speed of 12 m/s toward a
1. 2 answers
2. asked by hayley
3. 3,638 views
A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 512 Hz and has a
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2. asked by Cooper
3. 834 views