F2023_M202_A5

Y2

1. Concept questions in forms of multiple choices, filling blanks, and/or computations. a) Generally, the neutral axis of a curved beam under bending does not pass its centroid. True False False b) The transverse shear stress is significant in a slender beam. True_ c) A fixed-end beam is easier to buckle than a fixed-free end beam to buckle. True_, False_ d) Distortion energy theory is mainly for the torsion failure analysis. True False e) The fracture toughness obtained from a thin sheet specimen could be higher than that from a thick block specimen assuming that the same material is tested. True False

70) The lowest melting point for steel to be taught in the iron carbon phase diagram...A) eutectoidB) monocriticalC) eutecticD) subeutectoidE) peritectic 71) Which is not a surface texture parameter?A) roughnessB) cutting lengthC) arrayD) wavyE) hardness 72) Where do negative ions go in the electrochemical apparatus?A) to solutionB) to the cathodeC) first to the cathode, then to the anodeD) first to the anode, then to the cathodeE) anode

1-An example of a physical property is A) the reaction of rubidium with water to form rubidium hydroxide B) the density of boron C) the burning of sulfur to form sulfur dioxide D) the reaction of cesium with oxygen to form cesium superoxide E) the energy content of liquid sodium 2-If you have 600 kJ of heat to spend, and you use it to melt lead, how many % ounce wheel weights (at 200C) can you melt? Note that Lead is NOT measured in troy ounces, but proper ones (16 ounces in a pound), the specific heat of lead is 0.13 J/goC and its melting point is 327.5oC. 3-The written value of 1.0 um means a. 102 m b. 10-2 m c. 106 m d. 10-6 m e. 10-9 m 4-The written value of 1.0 um means a. 102 m b. 10-2 m c. 106 m d. 10-6 m e. 10-9 m 5- Which element has 71 neutrons? a) 222Rn b) 146 Nd c) 159Sm d) 140Ce e) 121Sn 3.9 6- Which of the following is NOT found in the nucleus? a) in b) He c) }H d) -je d) je 7- There are two common ions for gold: Au(1) and Au(III). Which of these would be the Auric ion?…

i need just the answer , please solve it quickly

1. Temperature (°C) From the diagram below, analyze a 40%Ni-60% Cu alloy at 1250°C. a.) What phases are present? b.) What are their chemical compositions? C.) If our system contains 100 grams, how much of each phase is present? 1300 MM CM 1200 20 -Liquid a Liquid. 112 3 4 5 ½ a 30 20 3 8 40 Composition (wt% Ni) 9 10 11 12 ½ 4 ½ 50

4- Aircraft structure is affected by some factors which cause typical damages.. Please correlate factors and damages on the colunmns below: Factors 1. Repetitive loads 2. Time (calendar) 3. Wear and tear Damages a) Corrosion b) Accidental damages c) Fatigue