In the figure, determine the character of the collision. The masses of the blocks, and the velocities before and after, are shown. The collision is 
Definitions:
Opponent-Process Theory
A psychological and neurological model that explains how the perception of colors derives from the opposition of three pairs of colors.
Color Vision
the ability of the human visual system to differentiate and perceive colors, which is produced by the interaction of light with the cone cells in the retina.
Pinna
The visible part of the ear.
Outermost Part
The most external or superficial layer of an object or body.
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