Redshifts were used as supporting evidence for the big bang theory. which describes redshifts? check all that apply. the light source and observer move closer together. observed light shifts to a longer wavelength. they indicate receding galaxies. observed light shifts to a shorter wavelength. the light source and observer move farther apart. they indicate approaching galaxies.

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 should seat belts not be mandatory quick plz

Who was the first scientist to measure speed as distance over time?