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Physics

Physics
Minimum number of unequal vectors which can give zero resultant are

four
three
more than four
two

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Physics
Damp clothes are dried in spin dryers by the action of

Centrifugal forces
Non central forces
Central forces
Centripetal forces

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Physics
What is the minimum escape velocity of rocket to be launched into space ?

11 Km/Sec.
5 Km/Sec.
6 Km/Sec.
15 Km/Sec.

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Physics
Magnetic field lines about a current-carrying wire

Both of these
Extend radially from the wire
Circle the wire in closed loops
None of these

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Physics
The value of coefficient of restitution in perfectly elastic collision is

1
0.5
2

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Physics
A spherical ball made of steel when dropped in mercury container

Will dissolve in mercury
Sink in mercury
Will be on the surface of mercury
Will be partly immersed mercury

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