TN Police PC · General Science · Quiz
5 real TN Police PC questions on General Science. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 5
MEDIUMA person is standing on a railway platform and hears a train whistle. As the train approaches, the pitch of the whistle appears higher, and as it moves away, the pitch appears lower. This phenomenon is an example of: