Physics
Air moves from the region where the air ________

Pressure is high to the region where the pressure is low
Pressure is low to the region where the pressure is high
Humidity is high to the region where the humidity is low
Humidity is low to the region where the humidity is high

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Physics
Holography is a technique of

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

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