CME 315 Lab 12

A composite material reinforced with aligned fibers, consisting of 20% by volume of silicon carbide (SiC) fibers and 80% by volume of polycarbonate (PC) matrix. The mechanical characteristics of the 2 materials are in the table. The stress of the matrix when the fiber breaks is 45 MPa. Calculate the longitudinal strength? SiC PC Elastic modulus (GPa) Tensile strength (GPa) 400 2,4 3,9 0,065

Differentiate between plastic deformation, elastic deformation, viscoelastic deformation and viscoplastic deformation.

Which of the following is true about strain? A It is the ability of the material to absorb force until fracture B It is dimensionless and is the ability of the material to absorb force until fracture It is dimensionless It can be evaluated as the force applied per area

Sublimation is preferred over recrystallization when you work with an amount of solid material to be purified that weighs: A) at least 1 kg B) about 100 mg C) about 1 mol D) about 1000 ml A OD

A diffusion controlled reaction takes place in a solvent whose viscosity can be manipulated by photo-induced cross-linking. This reaction taking place in the dark produces product at a rate that is 4 times the rate of the reaction taking place after a short exposure to light (but otherwise under the same conditions). What can we say about the viscosity of the solution following exposure to light?  a)The viscosity has doubled b)The viscosity has tripled c)The viscosity has quadrupled d)The viscosity has remained the same

Phase change properties of pure substances Cu C6H12 C (C6H5CH₂)₂0 (CH3CH₂)20 CH3CH₂OH (CH₂OH)2 NH₂COH Au C C6H14 H₂ copper cyclohexane diamond dibenzyl ether diethyl ether ethanol ethylene glycol formamide gold graphite hexane hydrogen 1084.62 6.7 4440 1.8 -116.22 -114.14 -13.0 2.57 1064.18 4489 -95.27 -259.16 2560 80.7 298 34.4 78.24 197.5 217 2836 3825 68.72 -252.879 0.385 1.841 0.51 2.369 2.438 2.394 2.389 0.129 0.709 2.27 14.304 13.26 2.68 -- 7.19 4.931 9.96 8.44 12.55 117.4 13.08 0.12 29.97 45.6 26.52 38.56 50.5 60.2 324 28.85 0.9 280.3 193.7 242 446 -- 234.4 -240.212 40.2 35.9 61.7 80 29.9 12.69

According to Riippi et al. (1998), briefly discuss the effects of increased compression force to the following tablet properties: Disintegration time Surface profiles (as seen on SEM photographs)

9.23 Propose structures for the compounds G and H whose ¹H NMR spectra are shown in Figures 9.35 and 9.36. G, C4H9Br 4.2 4.0 2.0 1.5 1.0 TMS 8 7 6 5 4 3 2 1 0 SH (ppm)

Graph the data. label each line the type of crystal

Stress, MPa 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6429 1.75 1.8 Strain, % Based on the image above, what is the maximum load that the material can sustain if its cross- sectional area is 28.27 mm^2? 1.385 E-3 N 1.385 E+6 N 1385 N 1.385 E+9 N 3.05

Chapter 14, Problem 50 Carbon tetrachloride (CCI4) is diffusing through benzene (CgHs), as the drawing illustrates. The concentration of CCI, at the left end of the tube is maintained at 1.65 x 10-2 kg/m3, and the diffusion constant is 19.5 x 10-10 m2/s. The CCI4 enters the tube at a mass rate of 5.56 x 1013 kg/s. Using these data and those shown in the drawing, find (a) the mass of CCI4 per second that passes point A and (b) the concentration of CCl, at point A. 5.00 x 10-3 m Cross-sectional area = 3.00 x 10-4 m2

Materials. The following terms are synonyms: tension, effort and stress.

- & Sketch New · C $ 7 ♡ www 1500 kg/m³ O 3000 kg/m³ 5000 kg/m³ 7000 kg/m³ 9000 kg/m³ 44 < HD E Material X has an atomic radius R = 0.125 nm, an atomic weight of A = 51 g/mol, and a body centered cubic (BCC) crystal structure. Calculate the mass density of this material. Hint: Do your calculations in SI units, as this will help avoid numerical errors from unit conversions. Choose the answer closest to your calculated value.