A balloonist drops his camera from a height of 100 m while his balloon is stationary. How long did it take to reach the ground?

In physics the desire of an object to keep doing what it is doing is termed?

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.

As the distance from a magnet increases, what happens to the magnet force?