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Homework Help: Unit Conversion (Fluid Mechanics)

  1. Jan 19, 2012 #1
    1. The problem statement, all variables and given/known data
    Calculate the density in lbm/ft3 with the given formula: ρ=p/RT where p=35 psi, R=1716 ft-lbf/slug-°R, and T=100°F.

    We have access to a table with basically any unit conversion we would need.

    3. The attempt at a solution

    (35 lb/in2)(144 in2/1 ft2)(1 slug-°R/1716 ft-lbf)(32.17 lbm/1 slug)(1.8K/1°R)(1 lbf/32.17 lbm-ft/s22)(1/310.9278K)

    I didn't crunch the numbers yet, because I know I haven't finished. Right now, this gives me an answer in lb-s2/ft4

    Any help in getting this into lbm/ft3 would be greatly appreciated.
    Thank you.
  2. jcsd
  3. Jan 21, 2012 #2
    Multiply by g which is 32.2 ft/sec^2.
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