Physics
Super conductors are substances that

Offer minimum resistance to flow of electric current
Offer high resistance to the flow of electric current
Conduct electricity at high temperature
Conduct electricity at low temperature

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Physics
Solids have definite shapes.This is because

The forces of adhesion are large
The forces of adhesion are less
The forces of cohesion are very large
The forces of cohesion of the molecules within are very much less in them

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