The runner completes exactly 2 laps around a 400 m track. what is the distance and displacement?

The least penetrating form of radiation is

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature

Aphase diagram assumes is kept constant.