What distance will the walker travel if he walks at 3.0 miles per hour for 1 hour and 20 minutes?

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

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