Hii please solve the last question ​

What is created when solids,liquids,an gases mix with one another

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.

Which of the following is an example of motion in two dimensions?