This is for TeeJ to What's up? (Don't answer until TeeJ answers please!) :]

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

The ozone hole appears in antarctica during

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?