if the coefficent of kinetic friction between a crate and the floor is 0.20, how much force is needed to slide a 92kg crate uniformly across the floor

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