How does the medium move in relation to the direction of energy transport in a transverse wave

1, perpendicular
2, parallel
3, side by side
4, underneath

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.

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

The solid that is formed and usually sinks to the bottom of a solution is the