When you slide a box across the floor what force must you push to be stronger than A) support force
B) friction force
C) gravity
D) air resistance

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