Answer the given question.

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

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr