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Unformatted text preview: energy. Therefore, the thermal gradient is held close to the value where convection first starts. Convection III 1 ( ) ( ) dT T r dP dr P r dr = 6 The outer 28% of the Sun Convection is present in about ~28% of the Suns outer radius. 7 Summary At lower temperatures convection is likely to be present. The actual onset of convection is determined by the absolute value of the radial temperature gradient, dT/dr. 1 ( ) ( ) dT T r dP dr P r dr=...
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 Spring '09
 HOUCK,J

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