Knowing that a 0.02-in. gap exists when the temperature is 75°F, determine (a) the temperature at which the normal stress in the aluminum bar will be equal to -11 ksi, (b) the corresponding exact length of the aluminum bar. В). Determine (a) the compressive force in the bars shown after a temperature rise of 180°F, (b) the corresponding change in length of the bronze bar. 0.02 in. -14 in. 18 in. Aluminum A = 2.8 in? E = 10.6 X 106 psi Bronze A = 2.4 in? E = 15 x 106 psi a = 12 x 10-6/°F a = 12.9 x 10-F

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A: Schematic diagram of the given problem:

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A:

Q: XXXX W₂ W₁ Which of the following most nearly gives the external degree of indeterminacy? 2 4 O 1

A:

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A: The x and y are the vertical and horizontal distances: x=12cos60=6 fty=6sin60=5.196 ft

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Q: 150 25 40 185 25 75 50

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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.