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A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness

A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is 1. 2. 1 3. 1.08 4. 2.02

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