What can scientists measure to provide evidence that electrons can move from one energy level to another?
the energy absorbed or released by atoms
the number of electrons deflected by a thin sheet of gold foil
the angle of deflection of alpha particles

The four giant gas points that are made primarily of lightweight elements are

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

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.