PH5 options Materials definitions
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Explain what is meant by a crystalline solid
Solid consisting of a crystal, or of many crystals, usually arranged randomly. The latter is technically a polycrystalline solid. Metals are polycrystalline.
Solid in which atoms are arranged in a regular array.
What is meant by an amorphous solid?
Atoms arranged quite randomly. e.g glass or brick. No long range order. Might be clusters of ordered atoms.
What is a polymeric solid?
A solid made up of chain like molecules.
Force per unit cross sectional area when equal opposing forces act on a body. Units: pa or Nm-¹
Extension per unit length due to an applied stress.
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