If you know the input distance in the output distance of a machine what do you calculate

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

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.

Hydrogen and helium are both members of?