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2. Explain briefly how a colloid is different from a dissolved species.? How do I reflect the triangle with coordinates A(-3,-2), B(-3,2), C(0,2) over the Line y=-2x-1? When is average velocity said to be constant? Hydrolysis of salt for ZnSO4? What does the E symbol between the t and the (-(pi/6),(pi/6)) mean in Calculus? What symbol is that?