A car that ran at 8 m/s crashed against another of the same mass that was stopped in front of a traffic light. What is the speed of the cars, assuming both stay together?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

What is the mass of the same rock on the earth

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.