Laboratory Dating Results

Atomic percentage, carbon °C 1,700 10 15 20 25 1,600 1,538° -1,495° 1,500 -L- 1,400 1,394 1,300 y+L 1,227 C 1,200 L+Fe C 1,148 -2.11- (austenite) 1,100 4.30 6.69- 1,000 912° y+Fe3C 900 800 727° 700 0.02 0.77 600 Fe3C |(cementite)- (ferrite) 500 400 a + Fe3C 300 200 100 Fe 2 3 4 6. Weight percentage, carbon 2.

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(a) An infrared gas analyser has a span of 01% of the component being measured. It operates at atmospheric pressure and was calibrated when the barometric pressure was 0.995 bar. The barometric pressure changes to 1.015 bar. What will the instrument read when the actual percentage of the component is (i) 0.5% (ii) 0.8%?

Temperature C 1100+ 1000 Liquid 900. 800. 700 600 L+AL 500 400 (AI) 300+ 0 548.2°C (Al)+0 (Cu) ΑΙ 10 20 30 40 50 60 70 80 Weight Percent Copper overall composition of alloy is 18:6wti. Cu Initial masses of individual metals A1-94·149 2) Cu-21529 90 100 Cu at 1000°c Q1 What is the composition of the first solid to appear Q2) What is the Composition of the second solid to appear. Q3) If the alloy where to be reheated, what would be the composition of the first liquid to appear. Quy Estimate the temp us time plot for the cooling process. from 100°c to room temperature.

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8. What is collimation and is this done (and if so where is it done) in the JASCO 730, the FTIR instrument (PerkinElmer or JASCO 'gas cell' instrument), and the fluorescence spectrometer (LS55)?

The Occupational Safety and Health Administration has set a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone. You are an industrial hygienist doing personal sampling on a worker who is supervising a production process that uses acetone. The upcoming exposures can be measured: 700 ppm for three hours and 1300 ppm for two hours. 3 hours at 900 ppm What is the TWA as calculated? What advice would you provide plant management regarding acetone exposure and PEL adherence?

(Ch 23 HW C Exercise 23.28 A concave mirror is constructed so that a man at a distance of 30 cm from the mirror sees his image magnified 2.0 times. Part A R What is the radius of curvature of the mirror? Express your answer using two significant figures. V < 9 of 11 ΑΣΦ Review | Constants | Periodic Table www P ? cin

800 A Eutectoid temperature H 1400 700 A H 1200 600 1000 500 B 800 400 A 300 600 M(start) 200 M + A 50% 400 M(50%) M(90%) 100 200 10-1 1 10 102 103 104 105 Time (s) Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the final microstructure and approximate amount of each. Assume a small specimen has been held long enough to have achieved a complete and homogeneous austenitic structure prior to treatment. Sample (1): Quickly cool specimen from 800°C to 575°C, hold for 10 s, then quench to room temperature. Sample (2): Quickly cool specimen from 800°C to 500°C, hold for 100 s, then quench to room temperature. O after treatment, sample 1 is 50% pearlite, 50% austenite O after treatment, sample 2 is bauxite O after treatment, sample 1 is 25% pearlite O after treatment, sample 2 is bainite O after treatment, sample 2 is austenite O None of the answers is correct. O after treatment, sample 2 is coarse pearlite O after treatment, sample 1 is…

Test Specimen 4140 CF steel 6061 T6 Al Gray Cast iron 40 FC Brass 360 Impact Energy (J or ft-lb) 48.5 ft-lb 25 ft-lb 12 ft-lb 27 ft-lb Impact Strength (J/m or ft-lb/in) 123.096 ft-lb/in 63.452 ft-lb/in What is the final analysis/ overall observation from the data? 30.457 ft-lb/in 68.528 ft-lb/in

Current Attempt in Progress During the recovery of a cold-worked material, which of the following statement(s) is (are) true? Some of the internal strain energy is relieved. O All of the internal strain energy is relieved. There is some reduction in the number of dislocations. There is a significant reduction in the number of dislocations, to approximately the number found in the precold-worked state. The electrical conductivity is recovered to its precold-worked state. The thermal conductivity is recovered to its precold-worked state. The metal becomes more ductile, as in its precold-worked state. O Grains with high strains are replaced with new, unstrained grains.

Based on the information in the table below answer the following questions Element Atomic radius (nm) Crystal structure Electronegativity Valance Cu 0.1278 FCC 1.9 +2 0.071 0.046 0.060 Ag 0.1445 FCC 1.9 +1 Al 0.1431 FCC 1.5 +3 Co 0.1253 НСР 1.8 +2 Cr 0.1249 ВСС 1.6 +3 Fe 0.1241 ВСС 1.8 +2 Ni 0.1246 FCC 1.8 +2 Pd 0.1376 FCC 2.2 +2 Pt 0.1387 FCC 2.2 +2 Zn 0.1332 HCP 1.6 +2 (a) Which of those elements in the table would form a substitutional solid solution having complete solubility with Pd? (b) Dose Ag or Pd have higher solubility in Copper?