1. A cylindrical pressure vessel is fabricated from steel plates which have a thickness of 20 mm. The diameter of the pressure vessel is 600mm. and its length is 4 meters. Determine the maximum internal pressure which can be applied if the stress in the steel is limited to 140 MPa. 2. Calculate the minimum wall thickness for a cylindrical vessel shown. The diameter of a vessel is 8.5 meters, the height is 12.3 meters and the stress in limited to 47 MPa. It is filled with motor oil. w - unit weight of motor oil = 8.95 KN/m Please help me to answer these questions thank you so much

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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.