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Which is not one of the strengthening mechanisms? O Form solid solutions O Precipitation Reduce grain...
Between the (external) surface energy and grain boundary energy in a solid material, which one is greater? Surface energy is higher Grain boundary energy is higher. Neither. Both are equal. Not enough information to make this comparison Vanadium, molybdenum, and sodium all have a body-centered cubic structure. Given the following atomic radii, which two metals are most likely to form a solid solution? Metal Atomic radii V 0.131 Μο 0.136 Na 0.186 Vanadium, molybdenum Vanadium, sodium Molybdenum, sodium Defects play...
Use the following key words for part I: Forging Solid Solution Alloying Rolling Grain Size Reduction Strain Hardening Extrusion I- Among the given key words: a) (3) Provide ALL techniques for cold working. b) (5) Provide ALL methods for material strengthening. In one sentence, explain how all these methods provide material strengthening. c) (2) Which method provides material strengthening by increasing the grain boundary surface? d) (2) Which method provides material strengthening by increasing the amount impurity atoms? e) (2)...
4.8. Of solution hardening, precipitation hardening and strain hardening, a. which one is reversed most easily by annealing and which one is not? b. which one remains effective at high temperatures?
Question 7 10 pts Which of the following will reverse the effects of cold working? O reducing the grain size adding impurities through solid state diffusion annealing the material at an elevated temperature rolling to induce anisotropy Question 8 10 pts Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 43.1° and 47.9°, respectively, with the tensile axis. If the critical resolved shear stress is 20.7 MPa,...
O(NH4)2CO3 There is no solid formed when the two solutions are mixed. QUESTION 30 An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The molecular equation contains which one of the following terms (when balanced in standard form)? O KCI(s) O KNO3(aq) O KNa(aq) OCINO3(aq) O NaCl(s) QUESTION 31 How many moles of Ca atoms are in 613.3 g Ca? 15.30 mol 6.535 x 10-2 mol
The Hall-Petch equation shows that increasing grain size in metallic materials: Select one: O a. Increases strength O b. Reduces ductility O c. Decreases strength O d. Increases fracture toughness
Part A Which one of the following will form an acidic solution in water? O LiF O LINO3 O Nal O NHACI O None of the above solutions will be acidic. Submit Request Answer Provide Feedback
which one of the following precipitation reactions does not
occur?
Question 16 Which ONE of the following precipitation reactions does NOT occur? O Pb(NO3)2 + 2NaCl → 2NaNO3 + PbCl2 O Pb(NO3)2 + ZnSO4 → PbSO4 + Zn(NO3)2 KNO3 + MgSO4 Mg(NO3)2 + K2SO4 CaCl2 + Na2CO3 – CaCO3 + 2Naci O Pb(NO3)2 + ZnSO4 – PbSO4 + Zn(NO3)2
Review Part B Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.30 g of sodium carbonate is mixed with one containing 4.71 of silver nitrate How many grams of silver nitrate are present after the reaction is complete? V AE R O ? Submit Request Answer
O CHEMICAL REACTIONS Predicting precipitation Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical formula in the last column. Da solution A solution Does a precipitate form when A and B are mixed? empirical formula of precipitate X 5 ? potassium hydroxide magnesium bromide barium bromide sodium acetate O yes no O yes no yes One copper(II) sulfate sodium sulfide