Recent content by Chestermiller

  1. Chestermiller

    Physics of Stretch: What pressure does a band apply on a cylinder?

    Is the allowed to contract in width when scenario 1 is applied? Is it allowed to contract in with what scenario 2 is applied?
  2. Chestermiller

    Enthalpy - published values

    This is not a correct interpretation. The difference between H2O l enthalpy and H20 g enthalpy is primarily the result of the difference in internal energies of the liquid and vapor, with only a veery small contribution to the difference in PV.
  3. Chestermiller

    Enthalpy - published values

    I totally oppose introducing this description in an attempt to assign a physical interpretation to enthalpy. I have seen it accomplish nothing but causing confusion among generation after generation of neophytes to the subject of thermodynamics. Enthalpy is just a convenient shorthand...
  4. Chestermiller

    Cantilever help

    Let's see you analysis so far, starting with your schematic of the system.
  5. Chestermiller

    A Condensate rate of water for an air conditioning cooling coil

    You need to be able to calculate the outlet temperature of the condenser. For this, you need to know the heat transfer coefficient between the air and the heat transfer surface. This is a function of the flow velocity and the condenser geometry. There may be experimental correlations of heat...
  6. Chestermiller

    I I need to simulate clothing meshes for hanging garments

    Can the fibers slide at the crossovers or are they locked?
  7. Chestermiller

    Reconcile poundforce w/slug and lbmass

    No. The 32.2 is fixed. And the measured force at the equator would be < 1 lb.
  8. Chestermiller

    Solubility of MgSO47H2O in water

    Maybe they counted the water of hydration as part of the total water.
  9. Chestermiller

    Solubility of MgSO47H2O in water

    https://www.sigmaaldrich.com/US/en/support/calculators-and-apps/solubility-table-compounds-water-temperature?srsltid=AfmBOorUE7OLxWEVYh6G9RL0gi9uEg95IcpF7DQmoPcuCs4Wdy45Kaj6
  10. Chestermiller

    How Do I Draw This Shear and Moment Diagram?

    You write an equation for the shear stress and bending moment vs x for each section of the beam. You then plot these equations on a graph.
  11. Chestermiller

    How Do I Draw This Shear and Moment Diagram?

    OK. Let's see your moment balances now.
  12. Chestermiller

    Reconcile poundforce w/slug and lbmass

    1 ##lb_f## is the force needed to give a mass of ##1\ lb_m## an acceleration of 32.2 ft/sec^2; it is also equal to the force needed to give a mass of 1 slug an acceleration of 1 ft/sec^2 $$1 slug = 32.2 lb_m$$ So, in terms of slugs and ##lb_f##, $$F =ma$$ but in terms of ##lb_f## and...
  13. Chestermiller

    How to estimate enthalpy change across a compressor in simple vapor compression cycle

    The mass flow rate is determined by the heat load of the overall system. Are you saying that you have no idea what the outlet conditions of the compressor are. If the compressor is operating adiabatically (and nearly reversibly), the inlet entropy- and outlet entropy per unit mass will be...
  14. Chestermiller

    Calculate waterflow on inclined plane

    For flow water down an incline, the Manning equation (in SI units) reads: $$v=\left(\frac{1}{n}\right)R^{2/3}S^{1/2}$$where v is the average flow velocity parallel to the incline, R is the hydraulic radius of the flow channel (R = h for an flat incline, with h representing the thickness of the...
  15. Chestermiller

    How Do I Draw This Shear and Moment Diagram?

    Where did that reaction force come from?
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