The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 162
... helium - 3 and helium - 4 , both remain liquid under their own vapour pressure when the temperature is reduced to absolute zero and can be solidified only by the application of an external mechani- cal pressure . The kinetic zero ...
... helium - 3 and helium - 4 , both remain liquid under their own vapour pressure when the temperature is reduced to absolute zero and can be solidified only by the application of an external mechani- cal pressure . The kinetic zero ...
Page 163
... Helium - 3- helium - 4 mixtures , however , remain liquid to lowest temperatures , and these do separate into a pure helium - 3 component and a mixture of the two isotopes . In metals the released electrons can move coherently ( in ...
... Helium - 3- helium - 4 mixtures , however , remain liquid to lowest temperatures , and these do separate into a pure helium - 3 component and a mixture of the two isotopes . In metals the released electrons can move coherently ( in ...
Page 164
... helium - 4 can be carried down to about 1 ° K and with liquid helium - 3 to about 0.3 ° K. By the third law of thermodynamics it is impossible to reduce the temperature of any sample precisely to zero , but in practice temperatures as ...
... helium - 4 can be carried down to about 1 ° K and with liquid helium - 3 to about 0.3 ° K. By the third law of thermodynamics it is impossible to reduce the temperature of any sample precisely to zero , but in practice temperatures as ...
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