Grey cast irons meetA. C is in the form of graphite. They are easy to machine at various hardness levels. They have good resistance to wear and fretting. Good vibration damping capacity.B. C is in the form of cementite.C. More difficult to machine than white cast irons.D. None of the above.

Indicate which option A, B, C or D meets the following 4 characteristics:- Many are relatively strong and ductile at room temperature.- Some have good resistance to high temperatures.- Most have relatively high electrical and thermal conductivities.- They have a large number of non-localized electrons. A. Metallic materialsB. Polymeric materialsC. CeramicsD. Composites

The inorganic part of bone is made of CaF2, or fluorite. For CaF2, the unit cell is cubic, and the structure is shown.  A. Calculate the percent ionic character of a Ca-F bond. B. Determine the coordination number for the fluorines. C. Determine the relationship between the lattice parameter, a, and the radii of the Ca and F atoms (or ions). You may want to start by determining whether there is one unit cell or four unit cells in the calcium fluoride structure. The bond radii for Ca is 1.05 Å and F is 1.33 Å.  D.

1. What are the principal natural processes that affect the petrophysical properties of sedimentary rocks? 2. As shown in Table 1.1, the total bulk chemical analysis of rock samples is clearly different from the surface analysis. What effect does this have on the rock properties?

2. Materials Properties and Bonding a. What is the grain boundary? Grain boundary density increase will decrease the strength values, is this correct? What is the difference between a low angle grain boundary and a high angle grain boundary? Draw pictures. b. If a material has equiaxed grains, would the materials properties be isotropic or anisotropic? c. A material is made up of a mixture of large grains and very small grains. Describe what happens when the material is heated at 90% of its' melting point for a long time? You can use 2 pictures or words. A material with a large bond strength generally has a high melting point: True or False? d. Do vacancies generally increase or decrease the resistivity of a metal? e. Arrange these crystal structures in order of APF (smallest to largest): всс, НСР, SC, FCC

Q: sintering means:   a.Shock cooling of molten glass to make frits. b.The molecular bonding of ceramic particles below their melting point.  c.Melting of non-refractory clay constituents. d.Condensation of constituent particles to form greenware.

Detrital sedimentary rocks are classified primarilyc B) type of bedding C) composition A) color on the basis of 54. Sedimentary rocks comprise approximately D) particle size A) 5 B) 15 C) 30 D) 50 percent of Earth's outermost 10 miles. 55. Which rock type is associated with a high-energy environment (such as a very turbulent stream)? A) conglomerate B) shale C) chert 56. Compaction would probably be most significant as a lithification process for D) none of these A) shale B) sandstone C) conglomerate D) breccia 57. The most abundant chemical sedimentary rock is A) limestone B) dolomite C) chert D) rock salt 58. Metamorphism may result from B) pressure C) chemical action A) heat D) all of these is a planar, parallel alignment of different mineral bands in a metamorphic rock. 59. C) Stress streaking B) Foliation D) Marbleizing A) Rock cleavage 60. The primary agent of contact metamorphism is B) heat D) strain C) stress A) folding 61. The geothermal gradient represents: A) The earth's…

Pls help ASAP. Pls help on both questions I BEG

C Clever | PoX + 6th Grade X Post Atten X A Classes https://app.nearpod.com/presentation?pin3DVZE5 bian 1. An Non-metallic mineral is not see-through. 2. A mineral is a little see-through. 3. A transparent mineral is see-through. 4. Luster is the way that a mineral reflects light. 5. translucent minerals look and shines like metal. 6. Metallic minerals are dull and earthy; not shiny. 7. A streak test shows the true color of a mineral. opaque

Two previously undeformed cylindrical specimens of an alloy are to be strain hardened by reducing their cross-sectional areas (while maintaining their circular cross sections). For one specimen, the initial and deformed radii are 17 mm and 11 mm, respectively.  The second specimen, with an initial radius of 13 mm, must have the same deformed hardness as the first specimen; compute the second specimen's radius after deformation.