List any four uses of air other than breathing?
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combustion
water cylcle
wind mill and electricity
we do not feel hot
water cylcle
wind mill and electricity
we do not feel hot
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4
Nitrogen
a) Nitrogen is used for industrial needs . It is extracted from air by cooling it liquefies .
b) Nitrogen combines with hydrogen to form ammonia which is used to manufactured fertilizer, such as urea , ammonium nitrate , etc
c) Nitrogen is used for making explosives and plastic .
Oxygen
a) Liquid oxygen , which is very cold , is used as a propellent for rockets .
b) Oxygen is used for cutting and welding metals .
c) Oxygen is given to patients who have difficulty in breathing .
d) Oxygen help in burning . Nothing can burn without oxygen .
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