Problem # 2. A wire 4 meters long is stretched horizontally between points 4 meters apart. A load W placed at the center of the wire produces a sag of 54.3 mm. If the wire is 25 mm^2 in cross-section and the modulus of elasticity is 200,000 MPa, what is the magnitude W.

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Q: 6. det ( A)

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Q: Exercise 3.2.3 Show that Zg under addition is isomorphic to Z; under multiplication.

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