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001 A wire of given density and total mass

Problem 001
A certain wire that weighs 8.5 g/cc has a total mass of 155 kg.

  1. What is the density of the wire in kg/m3?
  2. Find the volume of the wire in cubic centimeter.
  3. If the total length of the wire is 1500 m, find the cross-sectional area in square millimeters.

 

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Solution to Problem 219 Axial Deformation

Problem 219
A round bar of length L, which tapers uniformly from a diameter D at one end to a smaller diameter d at the other, is suspended vertically from the large end. If w is the weight per unit volume, find the elongation of ω the rod caused by its own weight. Use this result to determine the elongation of a cone suspended from its base.
 

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