Question

A physics student sits by the open window on a train moving at 25 m/sec towards...

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 137 meters form the station, it emits a whistle at a frequency of 3 × 103 Hz.

1) What frequency does the boyfriend hear ?

f =

2) What frequency does the physics student hear?

f =

3) A chemistry student (with nothing better to do than ride around on trains all day) is on a west bound train moving at a velocity of 20 m/sec towards the station. Before the two trains pass each other, what frequency will he hear from the train whistle from the physics student's train?

f =

4)What frequency will the chemistry student hear after his train passes the physics student's train?

f =

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A physics student sits by the open window on a train moving at 20 m/sec towards...
A physics student sits by the open window on a train moving at 20 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 138 meters form the station, it emits a whistle at a frequency of 2 × 103 Hz. 1) What frequency does the boyfriend hear ? f = 2) What frequency does the physics student hear? f = 3) A chemistry student (with nothing better to do...
A physics student decides to try out some recently learned physics. She jumps on her bike...
A physics student decides to try out some recently learned physics. She jumps on her bike and rides 8.6 m/s towards a wall playing the fundamental frequency of a closed pipe whistle (length 4.2 cm). What beat frequency does the student hear? You may assume the speed of sound on this day is 344 m/s.
Two trains are traveling toward each other. One train is traveling at 31 [m/sec] from our...
Two trains are traveling toward each other. One train is traveling at 31 [m/sec] from our left to the right. The other train is traveling at 40 [m/sec] from the right to the left. The train on the left blows the whistle at fο = 520 [Hz]. a) What is the frequency heard on the other train in still air? b) What is the frequency heard on the other train if there is wind blowing from the right to the...
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 497 Hz when the train is approaching him and 474 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.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT