Alguien es capaz de explicarme todo lo que paso e el descubrimiento de América? gracias

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

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.

Why don't you see your reflection in water with waves or repples