a)cold work (c) diffusionless transformation; (b) diffusional transformation; (d

Question

a)cold work (c) diffusionless transformation; (b) diffusional transformation; (d) annealing process (3 points) All but which of the following data are required to calculate the density of copper (a) crystal structure of Cu, which is face centered cubic( (b) atomic number of Cu, which is 29; (c) Avogadro's number, which is 0.6023 x1024; (d) the radius of Cu, which is 0.128nm J. (3 points) Given that the Young's modulus of E-glass fiber is 724x10"MPa and the of Young's modulus epoxy matrix is 6.9x10"MPa. What will be the isostran Young's modulus of the composite made from epoxy reinforced with 70 vol% E- glass fibers? K. (a) 72.4x103 MPa; (c) 39.6x103 MPa; (b) 26.6x103 MPa; (d) 52.8x103 MPa. L. (3 points) Upon heating, thermoplastic polymers become: (a) soft and deformable hard and rigid; (b) hard and rigid; (c) brittle; (d) al

Explanation / Answer

J. From all the points given, we will need the (a) crystal structure which is fcc. (C) the Avogadro number (d) the radius of the cu. Atomic number is not required but atomic mass of cu will be required.

L. On heating the thermoplastic polymers it beacome soft and deformable hard and rigid when cooled.

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