Calculate the composite modulus for polyester reinforced with 30 vol % Al2O3 whiskers under isostrain conditions. (For polyester, E = 6900 MPa. For Al2O3 whiskers E= 430 × 10³ MPa.) Express your answer to three significant digits. 15| ΑΣΦ The composite modulus is Submit Request Answer vec 6 ? MPa.
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- [(2.26 x 106) = 44.343] + 130.14 VG ΑΣΦΑΦ Submit hel CO micr HTC ΚΑΛΗΣΠΕΡ Εγκατ ACTI Birtugus Answer ?22-30. (a) The mean free path is the average distance a molecule travels before colliding with another molecule. The mean free path, A, is given by A = kT/(V20P), where k is Boltzmann’s constant, T is temperature (K), P is pressure (Pa), and o is the collision cross section. For a molecule with a diameter d, the col- lision cross section is nd. The collision cross section is the area swept out by the molecule within which it will strike any other molecule it encounters. The magnetic sector mass spectrometer is maintained at a pressure of ~103 Pa so that ions do not collide with (and deflect) one another as they travel through the mass analyzer. What is the mean free path of a molecule with a diam- eter of 1 nm at 300 K in the mass analyzer?4c. Calculate the values of Mn, Mw, Mz and polydispersity index for a polymer mixture having equivalent moles of two polymers with exact molecular weight being 2,000 Dalton and 10,000 Dalton.
- Bradford assay was used to determine bovine serum albumin (BSA) concentrations. The method works by binding Coomassie Brilliant Blue dye to protein standards and unknown, leading to a shift in the absorbance maximum of the dye. A stock solution of BSA is available (10 mg/ml) from which the protein standards were prepared. Bradford reagent, 290 ul, was pipetted into a transparent 96-well microplate. 10 ul of the protein dilution was added followed by mixing in the wells. After 5 min of incubation at room temperature, the plate was read in spectrum mode with the absorbance spectrometer of the microplate reader. The spectrum of the dye not bound to protein was also determined. Create a standard curve or regression equation that related the protein concentration and absorbance. An unknown BSA sample was prepared the same way as the standard and the OD was 0.35. determine the original concentration of the protein solution. The measurements can be seen below. 0.0625 Protein Concentration…(5) If 200 g of polymer A, 300 g of polymer B, 500 g polymer C, and 100 g of polymer D are mixed, calculate both M, and Mw of the blend? Polymer A Mn = 45,000; Polymer B M, = 100,000; Mw = 200,000 Polymer C M, = 80,000; Polymer D What are the polydispersity index and the standard deviation of the number distribution of molecular weight of the mixture? Mw = 65,000 Mw = 85,000 Mn = 300,000; Mw = 900,000Readion Cone, Nay S0, Cine HCI|Ab. 1 | Rabe I1.3085840 65.56796607 Cone, Nagd, 03 ATme (5) 0.10 M ·30M 04563164 |0.028 F09 13 ,15 M 12267196|0.01870913 30M |1.5360817 0.300349 O.10 M 3 0.050 M 5. 11431671 4 0.025 M 0:30M 1.3686611 1,358380874 1.007568 3. What is the overall order of the reaction? Write the complete rate law for this reaction.
- The researcher extracts a sample of well water and prepares it for TXRF analysis with a 10.00 mg/L V internal standard, like the calibration standards. The result produces SCa = 69297.81 and SV = 13481.2.Determine the concentration of Ca.P16B.1 The viscosity of benzene varies with temperature as shown in the following table. Use the data to infer the activation energy associated with viscosity. 0/°C 10 20 30 40 50 60 70 n/cP 0.758 0.652 0.564 0.503 0.442 0.392 0.358auDUIUance UI U.I JU ai 4JJ IIII III 1. UU CIII cuvclic. Calculate the molar absorptivity of the pigment at 453 nm? Q5) A student is tasked to determine the number of moles of H2SO4 (aq) in a 200 ml of an unknown solution. The student prepares a series of solutions with known concentrations of H2SO4 (ag) and measures the absorbance of each at an appropriate wavelength. These data are used to construct the calibration plot shown below. 1.00 0.80- 0.60 - 0.40- 0.20- 0.00- 3 x 10-4 6 x 10-4 Concentration (mol/L) If the absorbance of the unknown solution is 0.70, how many moles of H2SO4 (aq) does the 200 ml sample contain? Absorbance
- Alfred was tasked to synthesize at least 250.0 ppm of his novel gold nanoparticles (AuNP’s) to be able to perform experiments about the efficacy of AuNP for viral detection. He decided to check whether he still needed to synthesize more or not using a UV Vis spectrophotometer. Fortunately, he already prepared a 100.0 ppm AuNP standard solution beforehand. He got a different aliquot of the standard, added stabilizing solutions, and diluted them to 10.0 mL for the determination of absorbance. Data he obtained is shown below. Table 1. Calibration curve data for AuNP v of 100.0 ppm AuNP standard, mL Absorbance 0.00 0.200 0.50 0.450 1.00 0.510 1.50 0.600 2.00 0.680 3.00 0.810 4.00 0.950 After obtaining the calibration curve, he got a 3.00-mL aliquot of the pre-prepared solution, added stabilizing solution, and diluted it to 10 mL. He got 10mL of the final solution and determined its absorbance to be 0.650. The absorbance of the blank…Alfred was tasked to synthesize at least 250.0 ppm of his novel gold nanoparticles (AuNP’s) to be able to perform experiments about the efficacy of AuNP for viral detection. He decided to check whether he still needed to synthesize more or not using a UV Vis spectrophotometer. Fortunately, he already prepared a 100.0 ppm AuNP standard solution beforehand. He got a different aliquot of the standard, added stabilizing solutions, and diluted them to 10.0 mL for the determination of absorbance. Data he obtained is shown below. Table 1. Calibration curve data for AuNP v of 100.0 ppm AuNP standard, mL Absorbance 0.00 0.200 0.50 0.450 1.00 0.510 1.50 0.600 2.00 0.680 3.00 0.810 4.00 0.950 After obtaining the calibration curve, he got a 3.00-mL aliquot of the pre-prepared solution, added stabilizing solution, and diluted it to 10 mL. He got 10mL of the final solution and determined its absorbance to be 0.650. The absorbance of the blank…4g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil is contained in 30 g of the mixture? (c) If the specific gravity of the mixture is 0.781, what are the percent w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?