as a refrigerant (in liquid form) in low-temperature physics
in radiation therapy
as a substituent for nitrogen in the breathing gas for deep-sea divers
in fluorescent tubes
A
in radiation therapy
B
as a refrigerant (in liquid form) in low-temperature physics
C
in fluorescent tubes
D
as a substituent for nitrogen in the breathing gas for deep-sea divers
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Solution
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Helium is used for filing airships and balloons for meteorological observations.
Mixture of He with O2 under pressure is supplied to sea divers for respiration.
Helium is used to provide inert atmosphere in the welding of metals or alloys that are easily oxidized.
Helium is lighter than that of air and is used for inflating the tyres of bigaeroplanes.
Liquid form of Helium is used in as refrigerant.
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