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Al2O3 has a fracture toughness K1c of about 5MPa1/2. A batch of Al2O3 samples were found to contain surface flaws of about 29 m deep.

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Al2O3 has a fracture toughness K1c of about 5MPa1/2. A batch of Al2O3 samples were found to contain surface flaws of about 29 m deep. The average flaw size was more on the order of 12.6m. Estimate the compressive strength of the batch in units of GPa

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