What is the best description of a wave? a pulse that carries energy
a disturbance that moves matter
a medium disturbed by a vibration
matter that is moved from one place to another

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

When you turn on a battery-operated device, an electrical circuit is

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.