Materials Science and Engineering
Materials Science and Engineering
9th Edition
ISBN: 9781118324578
Author: Jr. William D. Callister
Publisher: WILEY
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Chapter 11.9, Problem 6DP
To determine

Which of the alloys that are quenched in moderately agitated oil and satisfies the surface and center hardness of 50 HRC and 40 HRC respectively, from the following:

  • 1040
  • 5140
  • 4340
  • 4140
  • 8640

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A) In a factory, an s-type pitot tube was used to calculate the velocity of dry air for a point inside a stack. Calculate the velocity at that point (ft/sec) using following conditions: ● • • Pressure = 30.23 ± 0.01 in Hg (ambient) Pitot tube coefficient = 0.847 ± 0.03 Temperature = 122 ± 0.1 F (stack) Temperature = 71.2 ± 0.1 F (ambient) AP = 0.324 ± 0.008 in H2O (pitot tube) • AP = 0.891 ± 0.002 in H2O (stack) B) Find the dominant error(s) when determining precision for the problem. C) For part A, what is the precision in ft/sec for the velocity?
Q1/ For what value of x do the power series converge: 8 (-1)n-1. x2n-1 2n-1 x3 x5 = X n=1 3 Q2/ Find the Interval of convergence and Radius of convergence of the series: 8 n Σ 3+1 n=1 (x)"
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