Iron sulfide (FeS) may form a crystal structure that consists of an HCP arrangement of S² ions. (a) Which type of interstitial site will the Fe²+ ions occupy? 2+ (b) What fraction of these available interstitial sites will be occupied by Fe²+ ions?

...to the dislocation In mixed dislocation, the slip vector is O A. Nether parallel nor normal O B. Parallel O C. Both parallel and Normal O D. Normal

Write down the Miller-Bravais index of the a-plane of the HCP Zn pure metal and draw the atomic arrangement of the a-plane cross-section with reference to the FCC example below.

Discuss 1st brillouin zone of Sc , Bcc and fcc lattices.

1. Is there a difference in packing (coordination number) between these two types (FCC and HCP) of structures?   2. Look at the two structures. A small difference in arrangement of atoms causes a dramatic difference in the properties of FCC ductile metals and HCP brittle metals. Can you see it? Try to draw the differences (You can draw the 3-layers separately):

Fishing line with a tensile strength of 25 lbs is used at B to fasten 2 members together as shown. Find the maximum force F that can be supported, given:L1 = 2 in, L2 = 4 in L3 = 6 in, L4 = 5 in

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What is the coordination number for atoms in the HCP structure? How does this compare to the coordination number for FCC? How would you expect HCP and FCC to compare in terms of APF? Which would be greater? (or would they be the same?)

The following figure displays both an Edge Dislocation and a Screw Dislocation. Answer the following questions regarding the characteristics of each Dislocation Edge dislocation Screw dislocation

Other than Carbon and Hydrogen what other element is present in the singular repeating structure of poly(vinyl chloric PVC Answer: