The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 1997 |
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Page 228
... layers some can remain free throughout the hours of darkness . The three layers are designated D , E , and F. The D layer is approximately 80 kilometres ( 50 miles ) high and exists only during daylight hours . Because it absorbs medium ...
... layers some can remain free throughout the hours of darkness . The three layers are designated D , E , and F. The D layer is approximately 80 kilometres ( 50 miles ) high and exists only during daylight hours . Because it absorbs medium ...
Page 795
... layer is located directly over a nitrogen atom in the adjacent layer ( see Figure 14 ) . In contrast , successive hexagonal layers of graphite are offset so that each carbon atom is directly above an interstice ( hole ) in an adjacent layer ...
... layer is located directly over a nitrogen atom in the adjacent layer ( see Figure 14 ) . In contrast , successive hexagonal layers of graphite are offset so that each carbon atom is directly above an interstice ( hole ) in an adjacent layer ...
Page 938
... layers of different chemical composition . The central region would contain elements such as iron and nickel with layers of successively lighter elements surrounding it and the outer- most layer containing essentially only hydrogen or ...
... layers of different chemical composition . The central region would contain elements such as iron and nickel with layers of successively lighter elements surrounding it and the outer- most layer containing essentially only hydrogen or ...
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