Engineering Materials
The molecules in a solid move

In circular motion
In a haphazard way
In a random manner
Back and forth like tiny pendulums

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Engineering Materials
Smelting is the process of

Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
Reducing the ore with carbon in the presence of a flux
Removing the impurities like clay, sand etc. from the iron ore by washing with water
All of these

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