A vertical retaining wall 6.8 meters high retains a horizontal backfill having the following properties: Void ratio = 0.70; Specific Gracvity = 2.61; Water Content = 30 %; Angle of internal Friction = 23°. Compute the magnitude of the active force in KN acting on the wall if the water table is on the ground surface which is on level with top of the wall.

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Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.