Physics
What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?

21 km/sec
11.2 km/sec
18 km/sec
35 km/sec

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

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Physics
Scalar Quantities are

Physical quantities which have no magnitude and no direction
Physical quantities which have magnitude only and direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and no direction

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