Using the solution to Problem 6.13, rank the magnitudes of the moduli of elasticity for the following hypothetical X, Y, and Z materials from the greatest to the least. The appropriate A, B, and n parameters (Equation 6.31) for these three materials are tabulated below; they yield EN in units of electron volts and r in nanometers:

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п Material 7.0 x 10-6 х 1.5 1.0 x 10-5 4.0 x 10-6 2.0 3.5