(a) Compare interstitial and vacancy atomic mechanisms for (a) Compare interstitial and vacancy atomic mechanisms for diffusion. (b) Cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion.
A Zn/Zn2+ concentration cell is constructed in which both electr A Zn/Zn2+ concentration cell is constructed in which both electrodes are pure zinc. The Zn2+ concentration for one cell half is 1.0 M , for the other, 10-2 M . Is a voltage generated between the two cell halves? If so, what is its magnitude […]
(a) Show, for a tensile test, that if there is no change (a) Show, for a tensile test, that if there is no change in specimen volume during the deformation process (i.e., A0l0 = Adld). (b) Using the result of part (a), compute the percent cold work experienced by naval brass (the stress-strain behavior of […]
An aluminum wire 4 mm in diameter is to offer a resistance of An aluminum wire 4 mm in diameter is to offer a resistance of no more than 2.5 ď. Using the data in Table 18.1, compute the maximum wire length.
An aluminum wire 10 m (32.8 ft) long is cooled An aluminum wire 10 m (32.8 ft) long is cooled from 38 to -1째C (100 to 30째F). How much change in length will it experience?
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?
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?
(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?