Two train whistles have identical frequencies of 175 hz. when one train is at rest in the station and the other is moving nearby, a commuter standing on the station platform hears beats with a frequency of 4.05 beats/s when the whistles operate together. what are the two possible speeds and directions the moving train can have? slower speed m/s correct: your answer is correct. faster speed m/s changed: your submitted answer was incorrect. your current answer has not been submitted.

The speed of the train is 7.75 m/s towards station.

The speed of the train is 8.12 m/s away from the station.

Explanation:

Given that,

Frequency of the whistles f= 175 Hz

Beat frequency

Speed of observer = 0

We need to calculate the frequency

Using formula of beat frequency

When the train moving towards station, then the frequency heard is more than the actual

Using Doppler effect

Put the value into the formula

The speed of the train is 7.75 m/s towards station.

When the train moving away form the station

Again beat frequency

We need to calculate the speed

Using Doppler effect

Put the value into the formula

The speed of the train is 8.12 m/s away from the station.

Hence, This is the required solution.

c) up is the direction the magnetic force is acting on the charge.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min