Microwaves are electromagnetic waves used in broadcasting and telecommunications. When do these waves increase in
frequency?
1. when the source moves away from you
2. when the source moves toward you
3. when you move away from the source
4. when you move away from the source and the source
moves away from you

Schist. hope it

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.