Probing questions
2. Let's use the term frequency of waves perceived by the observer to describe the frequency at
which waves are passing through the receiver. How do you describe the frequency of waves
perceived by the observer from the moment the source appears to the moment it disappears?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?