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1. Again assume that the giraffe's blood vessel has a pressure of 400 Torr at the bottom. The increase from 200 Torr to this pressure (400 Torr) caused the radius to expand by 10%. The original radius was 0.5 cm. What is the Young's modulus of the blood vessel's walls? Assume that the 0.5 cm radius is the inner radius of the vessel, and the vessel walls are 0.1 cm thick. Hint: this is similar to the aneurism homework problem.

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