1. A grade of -4.2% grade intersects a grade of +3.0% at Station 11 + 488.00 of  elevations 20.80 meters. These two center gradelines are to be connected by a 260  meter vertical parabolic curve. a) At what station is the cross-drainage pipes be situated? b) If the overall outside dimensions of the reinforced concrete pipe to be installed is  95 cm, and the top of the culvert is 30 cm below the subgrade, what will be the  invert elevation at the center?   PLEASE SOLVE IT USING THE EQUATIONS FOR A PARABOLA.  (y=Ax2+Bx+C)    DO NOT SOLVE THE REQUIRED USING THE GRADE DIAGRAM.

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Properties of materials

A property of a material describes its characteristics and distinguishes it from the others. The material properties are described it in terms of its hardness, color, appearances, and so on. The material properties generally depend on the type of material, or whether it is a metal or an alloy. There are different kinds of material properties such as mechanical properties, thermal properties, physical properties, and chemical properties. Chemical properties describe the material in terms of a chemical change. The mechanical properties come into existence when the material is acted upon by an external load. Thermal properties are associated with the temperature of the material and specific heat.