3. A simply supported beam (Span / -25 ft) has a section as shown below with normal-weight concrete compressive strength fe- 4000 psi (normal weight), and steel reinforcement yield strength - 40,000 psi. 24- 20 16" 6 No. 8 bars (a) Calculate the modulus of rupture of concrete per AC1318-19 ( (h) se gross section properties to calculate the cracking bending moment (Mer) (1 in concrete if a bending moment -90 kip-ft is

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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.