The reason for the polycrystalline zinc to be not considered as ductile in nature needs to be explained. Concept Introduction: The metals are rigid in nature. They are hard to compressed but there are some method by which the shape of metal can be changes. Ductility is the ability of a metal to be transformed into thin wires. Also, it is the ability of a metal to hold the plastic deformation which is caused by the dislocations in the crystal sytsem of the metal. The movement of dislocation is easy in the closed placked planes only.

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2. Consider a polymeric membrane within a 6 cm diameter stirred ultrafiltration cell. The membrane is 30 μm thick. The membrane has pores equivalent in size to a spherical molecule with a molecular weight of 100,000, a porosity of 80%, and a tortuosity of 2.5. On the feed side of the membrane, we have a solution containing a protein at a concentration of 8 g L-1 with these properties: a = 3 nm and DAB = 6.0 × 10-7 cm² s¹. The solution viscosity is 1 cP. The hydrodynamic pressure on the protein side of the membrane is 20 pounds per square inch (psi) higher than on the filtrate side of the membrane. Assume that the hydrodynamic pressure difference is much larger than the osmotic pressure difference (advection >> diffusion). Determine the convective flow rate of the solution across the membrane.

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Chapter 4, Problem 4.45P

Interpretation Introduction

Interpretation:

The reason for the polycrystalline zinc to be not considered as ductile in nature needs to be explained.

Concept Introduction:

The metals are rigid in nature. They are hard to compressed but there are some method by which the shape of metal can be changes. Ductility is the ability of a metal to be transformed into thin wires.

Also, it is the ability of a metal to hold the plastic deformation which is caused by the dislocations in the crystal sytsem of the metal. The movement of dislocation is easy in the closed placked planes only.

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