Chapter 21, Problem 21.11P

A piezoelectric material has a Young’s modulus of 72000 MPa. What stress is required to change its polarization from 640 C/m2 to 645 C/m2?

What is experimental stress analysis? Methods used in experimental stress analysis Explain the Photoelasticity method with its principles by writing their names.

Consider a system of nonrelativistic electrons in a white dwarf star at a temperature of 10^9 K. Very roughly, what would be their density if the system is degenerate? How does this compare with typical electron densities in ordinary matter of about 1030 electrons/m3?

You can use 1kV-30kV in a scanning electron microscope (SEM). You are asked to analyze the surface topography as well as bulk microstructure of a cast iron. Keep working distance and spot size constant for your experiment. CALCULATE the ‘electron interaction’ volume or depth of penetration of electron beams to the sample for the 2kV voltage (applied). Which voltage (2kV, 5kV, 10kV, 20kV, or 30kV) do you prefer for surface topography and which one for bulk microstructure? For calculation, consider the cast iron as just iron. Show your work.

in an FCC crystal Cu (111)[110] is a favorite system true or false explain

qjly21 For FCC iron, calculate the diffraction angle for the (220) set of planes. The lattice parameter for Fe is 0.3571 nm. Assume that monochromatic radiation having a wavelength of 0.1540 nm is used, and the order of reflection is 1.

A 90 wt% Cu - 10 wt% Ni alloy is known to have an electrical resistivity of 1.90 x 10-7 Ω * m at room temperature (25◦C). (a) Calculate the composition of a copper-nickel alloy that gives a room-temperature resistivity of 2.5 x 10-7 Ω * m. The room-temperature conductivity of pure copper is 6.0 x 107 [(Ω * m)−1] (from Table 18.1); assume that copper and nickel form a solid solution. (b) Briefly discuss the validity of your assumption that copper and nickel form a solid solution

8- Determine the unit cell edge length for zinc blende (ZnS) that has a rock salt crystal structure and a theoretical density of 4.102 g/cm³. Zn S

The bond length in FCC lattice is a/V2 V3a/2 0.5a a