A rectangular timber having an actual width of 71/2 in and an actual depth of 111/2 in servers as a simple beam with a span of 14 ft and carries a uniform load of 750 plf, which includes its own weight, over the entire span.The maximum shearing unit stress that would be produced in the beam by this load is A. 78.2 psi B. 60.8 psi C. 91.3 psi D. 112.6 psi

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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.