what happens when a sound source is moving?

Explanation:

It stretched or compresses the sound waves it is producing if it is relatively moving away to getting closer respectively. This is called the Doppler shift effect..

This is why when a wailing ambulance approached you, the pitch of its wailing is high but when it passes you and moves away from you the pitch of the wailing lowers. Remember this is happening relative to your position.

The question is incomplete, here is the complete question.

Why does madge begin by agreeing that mr. miller may be right in his claim on the dog?

a) she never wanted to keep the dog in the first place.

b) she uses sarcasm to win the argument and to insult miller.

c) she knows her husband does not stand a chance against miller.

d) she wants to relieve the tension in the room, so miller might listen to her.

She knows her husband does not stand a chance against Miller.

Explanation:

Madge and her husband Willed refused to accept the fact that the dog belonged to Miller. They strongly opposed Miller's proof of ownership claiming that he has no right whatsoever to say that the dog belongs to him.

Miller is a man with a strong body build, the muscles on his arms were strong enough to punch a person to the state of unconsciousness, he said to the couple "I reckon there's nothing in sight to prevent me from taking the dog right here and now". This statement made by Miller makes Madge to put a stop to any further argument with Miller because she knows that her husband cannot contest with his strength.