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An alternating copolymer is known to have a number-average molec An alternating copolymer is known to have a number-average molecular weight of 250,000 g/mol and a degree of polymerization of 3420. If one of the repeat units is styrene, which of ethylene, propylene, tetrafluoroethylene, and vinyl chloride is the other repeat unit? Why? Is this […]

An 8.0 mm (0.31 in.) diameter cylindrical rod fabricated from An 8.0 mm (0.31 in.) diameter cylindrical rod fabricated from a red brass alloy (Figure) is subjected to reversed tension-compression load cycling along its axis. If the maximum tensile and compressive loads are +7500 N (1700lbf) and -7500 N (-1700lbf), respectively, determine its fatigue life. […]

A three-point bending test is performed on a glass specimen The fracture strength of glass may be increased by etching away a thin surface layer. It is believed that the etching may alter surface crack geometry (i.e., reduce crack length and increase the tip radius). Compute the ratio of the original and etched crack tip […]

(a) Describe the phenomenon of dynamic equilibrium as it applies to oxidation and reduction electrochemical reactions. (b) What is the exchange current density? (a) Describe the phenomenon of dynamic equilibrium as it applies to oxidation and reduction electrochemical reactions. (b) What is the exchange current density? Is this the question you were looking for? If […]

(a) Briefly describe the phenomenon of electronic polarization b (a) Briefly describe the phenomenon of electronic polarization by electromagnetic radiation. (b) What are two consequences of electronic polarization in transparent materials? Is this the question you were looking for? If so, place your order here to get started!

(a) Cite the major differences between activation and concentra (a) Cite the major differences between activation and concentration polarizations. (b) Under what conditions is activation polarization rate controlling? (c) Under what conditions is concentration polarization rate controlling? Is this the question you were looking for? If so, place your order here to get started!

(a) Briefly describe the microstructural difference between sphe (a) Briefly describe the microstructural difference between spheroidite and tempered martensite. (b) Explain why tempered martensite is much harder and stronger. Is this the question you were looking for? If so, place your order here to get started!

(a) Briefly cite the main differences between ionic, covalent, (a) Briefly cite the main differences between ionic, covalent, and metallic bonding. (b) State the Pauli Exclusion Principle. Is this the question you were looking for? If so, place your order here to get started!

Aluminum–lithium alloys have been developed by the aircraft indu Aluminum–lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a density of 2.55 g/cm3 is desired. Compute the concentration of Li (in wt %) that is required Is this […]

(a) A three-point transverse bending test is conducted on a (a) A three-point transverse bending test is conducted on a cylindrical specimen of aluminum oxide having a reported flexural strength of 390MPa (56,600psi). If the specimen radius is 2.5 mm (0.10 in.) and the support point separation distance is 30 mm (1.2 in.), predict whether […]