This is the combined effect low pressure & speed of plane
in sky. Body of aircraft is made up of aluminium due to its
good tensile strength & good conductor.
( Amritpal Singh Sidhu)
Up in the sky the temperature is very cold and human body
cannot sustain such cold, so to maintain a temperature
sustainable by human body Air conditioning is used inside.
The plane body is not made of alluminium but aluminium
alloy i.e duralumin , for high tensile strength, light in
weight, high toughness to maintain its shape at high speeds
in the sky , good conductor , easily formed to shape etc.
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