Physics
A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments

Depends on the speeds of various fragments
Depends on the total mass of all the fragments
Is infinity
Is zero

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Physics
Holography is a technique of

Recording a permanent three dimensional photograph of a given single colour or a multicolour
Recording a permanent, sharp two diimensional black and white or multicolour photograph
Recording a permanent three dimensional multicolour photograph
Recording a permanent three dimensional black and white photograph

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Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

None of these
It will fall down at the same place where the string breaks
The ball will travel towards the center of the circle and fall down
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

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