A train station bell gives off a fundamental tone of 500 Hz as the train approaches the station at a speed of 30.0 m/s. If the speed of sound in air is 339 m/s, what will be the apparent frequency of the bell to an observer riding the train?

548.5 Hz

Explanation:

We are given that

Frequency of source=500 Hz

Speed of train=30m/s

Speed of sound in air=339m/s

We have to find the frequency of the bell to an observer riding the train.

The apparent frequency for the listener

Where Frequency of source

=Speed of sound

=Speed of source

Using the formula

The apparent frequency of the bell to an observer riding the train=

Hence, the apparent frequency of the bell to an observer riding the train=548.5 Hz

the correct choice is a .

do not post any more test or exam questions on