a) Compute the voltage at 25°C of an electrochemical cell (a) Compute the voltage at 25째C of an electrochemical cell consisting of pure cadmium immersed in a 2 ( 10-3 M solution of Cd2+ ions, and pure iron in a 0.4 M solution of Fe2+ ions. (b) Write the spontaneous electrochemical reaction.
A polystyrene component must not fail when a tensile stress A polystyrene component must not fail when a tensile stress of 1.25MPa (180psi) is applied. Determine the maximum allowable surface crack length if the surface energy of polystyrene is 0.50 J/m2 (2.86 ( 10-3 in.-lbf/in.2). Assume a modulus of elasticity of 3.0GPa (0.435 ( 106psi).
A piece of corroded steel plate was found in a A piece of corroded steel plate was found in a submerged ocean vessel. It was estimated that the original area of the plate was 10 in.2 and that approximately 2.6 kg had corroded away during the submersion. Assuming a corrosion penetration rate of 200 mpy […]
A parallel-plate capacitor with dimensions of 100 mm by 25 A parallel-plate capacitor with dimensions of 100 mm by 25 mm and a plate separation of 3 mm must have a minimum capacitance of 38 pF (3.8 ( 10-11 F) when an ac potential of 500 V is applied at a frequency of 1 MHz. […]
Calculate the fraction of lattice sites that are Schottky defect Calculate the fraction of lattice sites that are Schottky defects for sodium chloride at its melting temperature (801째C). Assume an energy for defect formation of 2.3 eV.
A parallel-plate capacitor using a dielectric material having A parallel-plate capacitor using a dielectric material having an r of 2.5 has a plate spacing of 1 mm (0.04 in.). If another material having a dielectric constant of 4.0 is used and the capacitance is to be unchanged, what must be the new spacing between the […]
A load of 85,000 N (19,100lbf) is applied to a A load of 85,000 N (19,100lbf) is applied to a cylindrical specimen of a steel alloy (displaying the stressâstrain behavior shown in Figure) that has a cross-sectional diameter of 15 mm (0.59 in.). (a) Will the specimen experience elastic and/or plastic deformation? Why? (b) If […]
A large-particle composite consisting of tungsten particles with A large-particle composite consisting of tungsten particles within a copper matrix is to be prepared. If the volume fractions of tungsten and copper are 0.60 and 0.40, respectively, estimate the upper limit for the specific stiffness of this composite given the data thatfollo
Calculate the number of vacancies per cubic meter in iron Calculate the number of vacancies per cubic meter in iron at 850(C. The energy for vacancy formation is 1.08 eV/atom. Furthermore, the density and atomic weight for Fe are 7.65 g/cm3 and 55.85 g/mol, respectively.
A large tower is to be supported by a series A large tower is to be supported by a series of steel wires. It is estimated that the load on each wire will be 11,100 N (2500lbf). Determine the minimum required wire diameter assuming a factor of safety of 2 and a yield strength of […]