There is a disk of cartilage between each pair of vertebrae, Ask an Expert

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There is a disk of cartilage between each pair of vertebrae in your spine. Healthy cartilage has a Young's modulus of approximately 10^6 N/m^2.

Suppose a disk is 0.50 cm thick and 4.0 cm in diameter. If this disk supports half the weight of a 90 kg person, by what fraction of its thickness does the disk compress?

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