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
Monel alloy is

Not used in cast and wrought forms
Used for making steam valves and turbine blades as it resists steam attack at high temperature
The costliest of all the alloys of nickel
Not suitable for making kitchen utensils

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