Physics
Which set of conditions represents the easiest way to liquify a gas ?

High temperature and low pressure
Low temperature and low pressure
High temperature and high pressure
Low temperature and high pressure

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Physics
Absolute Zero is defined as

The temperature at which all molecular motion ceases
At which the volume becomes zero
At which liquid Helium boils
At which water boils at 298K

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Physics
Holography is a technique of

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

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