Difference between revisions of "Dictionary:Core"

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{{lowercase}}{{#category_index:C|core}}
 
{{lowercase}}{{#category_index:C|core}}
<b>1</b>. A rock sample cut from a borehole or retrieved from the sea floor. See [[Dictionary:core_analysis|''core analysis'']]. <b>2</b>. The Earth&#x2019;s core is the central portion bounded by the Gutenberg discontinuity (&#x2248;2900 km deep) that separates it from the mantle. The core&#x2019;s radius is &#x2248;3500 km; it is presumed to be composed predominantly of iron and silicates. See Figure [[Dictionary:Fig_E-1|E-1]]. Divided into <b>outer core</b> (which will not transmit S-waves) and <b>inner core</b>, the radius of the inner core being about 1220 km. The inner core was discovered by Inge Lehmann in 1936. <b>3</b>. A material of high magnetic permeability placed in the center of a coil of wire. Used in the flux-gate magnetometer for measuring magnetic fields. <b>4</b>. A [[Dictionary:magnetic_core|''magnetic core'']] (q.v.) is a device that used to be used in rapid-access memories.
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# A rock sample cut from a borehole or retrieved from the sea floor. See [[Dictionary:core_analysis|''core analysis'']].  
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# The Earth's core is the central portion bounded by the Gutenberg discontinuity (&#x2248;2900 km deep) that separates it from the mantle. The core&#x2019;s radius is &#x2248;3500 km; it is presumed to be composed predominantly of iron and silicates. See Figure [[Dictionary:Fig_E-1|E-1]]. Divided into '''outer core''' (which will not transmit S-waves) and '''inner core''', the radius of the inner core being about 1220 km. The inner core was discovered by [[Inge Lehmann]] in 1936.
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# A material of high magnetic permeability placed in the center of a coil of wire. Used in the flux-gate magnetometer for measuring magnetic fields.
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# A [[Dictionary:magnetic_core|''magnetic core'']] (q.v.) is a device that used to be used in rapid-access memories.

Revision as of 09:54, 21 May 2015

  1. A rock sample cut from a borehole or retrieved from the sea floor. See core analysis.
  2. The Earth's core is the central portion bounded by the Gutenberg discontinuity (≈2900 km deep) that separates it from the mantle. The core’s radius is ≈3500 km; it is presumed to be composed predominantly of iron and silicates. See Figure E-1. Divided into outer core (which will not transmit S-waves) and inner core, the radius of the inner core being about 1220 km. The inner core was discovered by Inge Lehmann in 1936.
  3. A material of high magnetic permeability placed in the center of a coil of wire. Used in the flux-gate magnetometer for measuring magnetic fields.
  4. A magnetic core (q.v.) is a device that used to be used in rapid-access memories.