Physics
Oil raise up the wick in a lamp. The principle involves

the diffusion of oil through the wick
volatility of oil
the liquid state of oil
capillary action phenomenon

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Physics
Inside an aeroplane, flying at a high altitude,

the pressure is the same as that outside.
normal atmospheric pressure is maintained by the use of air pumps.
the pressure inside is less than the pressure outside.
normal humidity and partial vacuum are maintained.

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