Question

A car emits a sound at a frequency of 2500 Hz when the car is at...

A car emits a sound at a frequency of 2500 Hz when the car is at rest. The car then accelerates uniformly for 6.5 second, at which time an observer hears the sound of the car to be 3236 Hz. What would be the acceleration of the car? Assume the air temperature to be 20oC.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

At 20 degree C temperature, the speed of sound in air is V = 340 m/s (approximately)

Note that the answer may vary due to this. The speed of sound in air at that temperature can lie in the range from 336 m/s to 343 m/s. Here, I have taken it to be 340 m/s.

frequency of sound emitted by the car is n = 2500 Hz

Lets assume that, at time t = 6.5 second after the car starts accelerating, the speed of the car would be vc and the obsrver will hear the sound fraquency at n' = 3236 Hz

Let acceleration of the car is a .

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A siren of a police car at rest emits at a predominant frequency of 1310 Hz....
A siren of a police car at rest emits at a predominant frequency of 1310 Hz. A frequency of 1390_Hz is heard when the police car is approaching an observer standing by a bus stop. a) What is the velocity of the police car in m/s? b) what will be the frequency heard by the person standing at the bus stop when the police car is moving away? and c) Report the velocity of the police car in miles per...
A stationary police car emits a sound of frequency 1225 Hz that bounces off of a...
A stationary police car emits a sound of frequency 1225 Hz that bounces off of a car on the highway and returns with a frequency of 1265 Hz. The police car is right next to the highway, so the moving car is traveling directly toward or away from it. What frequency would the police car have received if it had been traveling toward the other car at 22.0 m/s? P/s: the car was moving 5.53 m/s
stationary police car emits a sound of frequency 1200 Hz that bounces off of a car...
stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns with a frequency of 1280 Hz . The police car is right next to the highway, so the moving car is traveling directly toward or away from it. Part A: How fast was the moving car going? Part B: Was the moving car moving towards or away from the police car? Part C: What frequency would the police car...
A stationary police car emits a sound of frequency 1200 Hz that bounces off of a...
A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns with a frequency of 1230 Hz . The police car is right next to the highway, so the moving car is traveling directly toward or away from it. Part A How fast was the moving car going? What frequency would the police car have received if it had been traveling toward the other car at 17.0 m/sm/s ?...
A moving source emits a sound of frequency 600.0-Hz. A stationary listener detects a frequency of...
A moving source emits a sound of frequency 600.0-Hz. A stationary listener detects a frequency of 640.0-Hz. The ambient temperature is 33.0°C. Determine a) the speed of sound at the ambient temperature of 33.0°C. b) the speed of the moving source for the given source and detected frequencies.
A car horn produces a sound with a frequency of 408 Hz. The horn is sounded...
A car horn produces a sound with a frequency of 408 Hz. The horn is sounded while the car is moving down the street in the same direction as a bicycle which is ahead of the car. The bicyclist is moving down the street with 1/5.46 the speed of the car and hears a frequency of 436 Hertz. Determine the speed of the car (in m/s). The speed of the sound is 345 m/s.
1) A car is approaching a reflecting wall. A stationary observer behind the car hears a...
1) A car is approaching a reflecting wall. A stationary observer behind the car hears a sound of frequency 790 Hz from the car horn and a sound of frequency 873 Hz from the wall. (a) How fast is the car traveling? .......... km/h (b) What is the frequency of the car horn? ........... Hz (c) What frequency does the car driver hear reflected from the wall? ............ Hz ------------------------------------------------------------------------------------------------ 2) A bat flying toward an obstacle at 10 m/s...
A fire truck emits an 1080 Hz siren. As the truck approaches an observer on the...
A fire truck emits an 1080 Hz siren. As the truck approaches an observer on the sidewalk, he perceives the frequency of the siren to be 1150 Hz. Approximately what frequency does he hear after the truck passes and is moving away? Assume the truck's velocity remains constant, and that the velocity of sound in air is 340 m/s.
(1) Suppose an oncoming ambulance moving at 115 km/h emits a steady 810-Hz sound from its...
(1) Suppose an oncoming ambulance moving at 115 km/h emits a steady 810-Hz sound from its siren. Part (a) What frequency, in Hz, is received by a person watching the oncoming ambulance? The speed of sound on this day is 345 m/s. Part (b) What frequency, in Hz, does she observe after the ambulance has passed? (2). In this problem take the speed of sound to be 349 m/s. How fast, in meters per second, does an observer need to...
An electronic point source emits sound isotropically at a frequency of 3 × 10^3 Hz and...
An electronic point source emits sound isotropically at a frequency of 3 × 10^3 Hz and a power of 25 watts. A small microphone has an area of 0.72 cm^2 and is located 4.12 meters from the point source. The speed of sound is 343 m/s. What is the sound intensity at the microphone? What is the power intercepted by the microphone? What is the sound intensity level (in dB) at the microphone from this point source? What would be...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT