Question

You stand on a platform at a train station and listen to a train as it approaches at constant speed, but before it arrives. You will hear:

a. the intensity and the frequency of the sound both increasing.

b. the intensity and the frequency of the sound both decreasing.

c. the intensity increasing and the frequency decreasing.

d. the intensity decreasing and the frequency increasing.

e. the intensity increasing and the frequency remaining the same.

f. the intensity decreasing and the frequency remaining the same.