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[" In astronomy order of magnitide estim...

[" In astronomy order of magnitide estimation "],[" plays an important role.the derivative "(dp)/(dr)can],[" be taken difference ratio "(Delta P)/(Delta r)." Consider the "],[" star has a radius "R" ,presure at its centre is "P_(e)],[" and pressure at outer layer is zero if the "],[" average mass is "(M_(Q))/(2)" and average radius "(R_(o))/(2)],[" tehn the expression for "P_(c)" is "]

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