Determine the forces in members CD, CJ, and DJ. The forces are positive if in tension, negative if in compression. Assume a = 9 ft, b = 7 ft, d = 5 ft. M CD = Answers: CJ = a DJ = A i L b L B -6 panels at d K V L C J V D L L L L I E V L H V L F L G

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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.