Question

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed...

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 341 m/s.

(a) An observer waiting at the crossing receives a frequency of 213 Hz. What is the speed of the train? ____m/s

(b) What frequency does the observer receive as the train moves away? ____Hz

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
Iron man loves to listen to the Doppler Effect. While waiting for a commuter train that...
Iron man loves to listen to the Doppler Effect. While waiting for a commuter train that blows its 200-Hz horn as it approaches a crossing he observes the frequency to be 208 Hz. [It is a nice day and the speed of sound is 335 m/s] What frequency does he observe as the train moves away?
A train approaches a crossing at a speed of 20.0 m/s, sounding a horn with a...
A train approaches a crossing at a speed of 20.0 m/s, sounding a horn with a frequency of 1000 Hz. A driver stopped at the crossing blows his horn (f = 800 Hz) in frustration. (a) What frequency does the driver hear coming from the approaching train horn? (b) The driver continues blowing his horn after the train passes. What frequency does the train engineer hear coming from the car horn as the train moves away from the crossing?
A commuter train blows its horn as it passes a passenger platform at a constant speed...
A commuter train blows its horn as it passes a passenger platform at a constant speed of 37.3 m/s. The train horn sounds at a frequency of 340 Hz when the train is at rest. What is the frequency observed by a person on the platform as the train approaches? What is the frequency observed by that person as the train recedes from him? Calculate the wavelength for the approaching train. Calculate the wavelength for the receding train.
1. A commuter train blows its horn as it passes a passenger platform at a constant...
1. A commuter train blows its horn as it passes a passenger platform at a constant speed of 41.8 m/s. The train horn sounds at a frequency of 335 Hz when the train is at rest. What is the frequency observed by a person on the platform as the train approaches? REPORT ALL ANSWERS IN 4 DECIMALS 2. What is the frequency observed by that person as the train recedes from him? REPORT ALL ANSWERS IN 4 DECIMALS 3. Calculate...
A train is moving away from an observer at 31.0 m/s blows a 305 Hz whistle....
A train is moving away from an observer at 31.0 m/s blows a 305 Hz whistle. What frequency is detected by the stationary observer? Assume standard pressure and 20°C for the speed of sound.
A train sounds its horn as it approaches an intersection. The horn can just be heard...
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. (a) What is the average power generated by the horn? W (b) What intensity level of the horn's sound is observed by someone waiting at an intersection 48 m from the train? Treat the horn as a point source and neglect any absorption of sound by the air. dB
A train is moving past a crossing where cars are waiting for it to pass. While...
A train is moving past a crossing where cars are waiting for it to pass. While waiting, the driver of the lead car becomes sleepy and rests his head on the steering wheel, unintentionally activating the car's horn. A passenger in the back of the train hears the horn's sound at a frequency of 435 Hz and a passenger in the front hears it at 407 Hz. Find the train's speed and the horn's frequency. Take the speed of sound...
the train is moving past a crossing where cars are waiting for it to pass. while...
the train is moving past a crossing where cars are waiting for it to pass. while waiting, the driver of the lead car becomes sleepy and rests his head on the steering wheel, unintentionally activating the cars horn. a passenger in the back of the train hears the horns sound at a frequency of 434 Hz and a passenger in the front hears it at 409 Hz. find the trains speed and the horns frequency, assuming the sound travels along...
1) A pedestrian waiting for the light to change at an intersection hears a car approaching...
1) A pedestrian waiting for the light to change at an intersection hears a car approaching with its horn blaring. The car's horn produces sound with a frequency of 381 Hz, but the pedestrian hears a frequency of 389 Hz. How fast is the car moving? 2) A train moving with a speed of 31.3 m/s sounds a 151 Hz horn. What frequency is heard by an observer standing near the tracks as the train approaches?
A train is moving past a crossing where cars are waiting for it to pass. While...
A train is moving past a crossing where cars are waiting for it to pass. While waiting, the driver of the lead car becomes sleepy and rests his head on the steering wheel, unintentionally activating the car's horn. A passenger in the back of the train hears the horn's sound at a frequency of 433 Hz and a passenger in the front hears it at 404 Hz. Find the train's speed and the horn's frequency, assuming the sound travels along...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT