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  1. mechanical engineering - Pound-force (lbf) vs Pound-mass (lbm ...

    Aug 25, 2015 · The following relationship is key to understand the link between lbm and lbf: 1 lbf=32.174 lbm ft/s^2 Arm yourself with this knowledge so that you can fight the good fight: the next time you …

  2. fluid mechanics - Different Values for Different Calculations of ...

    Apr 19, 2022 · Hmmm. Maybe 62.4 lbf/ft^3 calculated from converting from N/m^3 and 62.4 lb/ft^3 used in the formula of density*gravity are really the same thing. Why are you multiplying 62.4 by gravity?

  3. pound force and pound mass - Engineering Stack Exchange

    Feb 16, 2021 · I have a question about work measured in foot-pound. Let's say we have a 10 pound-mass ($10$ $\\text{lb}_m$) object. Then since that 10 pound-mass ($10$ $\\text{lb}_m$) object gives …

  4. Barometer Column with Mercury - Engineering Stack Exchange

    Olin's method yields the correct answer, but a dimensional analysis of the pressure number shows it using lbf. I barely understand how to go between lbf and lbm mass anyway, the only consistent way I …

  5. Mass and weight of air in a room - Engineering Stack Exchange

    This is the weight of the air assumed at sea-level... W = m×g W = m × g W = 434.3⋅lbm× 32.174 ⋅ ft s2 W = 434.3 l b m × 32.174 f t s 2 = 13976⋅lbf = 13976 l b f Question: I find it hard to believe that in an …

  6. Unit Conversion for Mass Density - Engineering Stack Exchange

    Mar 29, 2020 · I am doing a Finite Element analysis of a continuum. In my problem definition I use these units: mm for length, kPa for applied stress, and MPa for material stifness (Young's modulus). With …

  7. Thermodynamics - heat exchanger - Engineering Stack Exchange

    Jan 10, 2021 · A thin walled double pipe counter flow heat exchanger is to be used to cool oil (Cp = 2198 J/kg°K) from 150°C to 40°C at a rate of 2.27kg/s by water (Cp = 4187 J/kg°K) that enters at …

  8. How to Convert between Air (Dry Air) Normal Liters per Minute (NLPM ...

    Oct 21, 2021 · I need to check the leakage of a product, the requirement is basically need to place a flow meter between dry air supply and the product, and apply a pressure of 100, 200, or 400 PSI, …

  9. Converting air flow rate between kg/s and m^3/s

    Apr 21, 2015 · Is 1 kg/s of air flow rate equivalent to 1 m 3 /s? I am calculating supply air flow rate into a zone for an air conditioning system. The simulation software gives the result in m 3 /s but the …

  10. mechanical engineering - Determine abs pressure in a tank where the …

    The atmospheric pressure obtained cannot be right because the scalar value $5402$ is no where near $14.7$ and the units obtained ($\frac {lbm} {in\cdot s^2}$) look completely wrong.