You are evaluating a variety of new materials for use in the femoral stem of a hip joint replacement. A. Draw the reduced sphere Diagrams of the crystal structures of materials
1. Simple cube.
2. FCC
B. Identify the crystal structure. For each structure.
C. Calculate the coordination number.
D. Derive the relation between r ( radius of sphere) and a ( length of cubic side) and determine the APF of each.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.