For the frame shown support C is a pin (hinge), A is a roller, and B is fixed (rigid). The shear at A is: 4 kN/m B -5 m- 60. A 3 m- Select or O a. 6.25 kN Ob. - 6.25 kN Oc. 4 kN Od. 3.125 kN

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.