Materials and Construction
The behaviour of visco-elastic material is time dependent. This behaviour is commo in __________ materials.

Crystalline
Rubberry
Non-crystalline organic polymeric
Non-crystalline solid

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Materials and Construction
Duriron is

All of these
Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
High silicon iron
Acid resistant, brittle and very hard

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