Materials and Construction
Visco-elastic behaviour of materials which is time dependent is common in

Crystalline solid
Plastics
Non-crystalline organic polymer
Non-crystalline solids

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Materials and Construction
Lead is

Not used as pigment (in its compound forms) for paints
Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
Not resistant to corrosion
Used as a cathodic material

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