Physics
A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:

Just after it is dropped
When it touches the ground
When it is just on the half-way
Just before it touches the ground

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Physics
Holography is a technique of

Recording a permanent three dimensional multicolour photograph
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 black and white photograph

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