Recent content by MotoPayton

  1. M

    How Are Thermodynamic Property Tables Created?

    Ok, yes. Put one mole of an inert gas into a constant volume container and measure the pressure at varying temps. If using the atm,mole,celcius,liter system you will find 22.4 liters at 0 celcius and 1atm no matter what. Then you can follow that line all the way to zero pressure and notice that...
  2. M

    How Are Thermodynamic Property Tables Created?

    In the back of my thermodynamics book it has large quantities of thermodynamics properties listed for water--ie temperature, pressure, specific volume, internal energy, enthalpy, and enthalpy. I would like to know how these tables are built and the methods used to ascertain the data in...
  3. M

    Copper wire and shove it into the positive terminal

    If I were to take a copper wire and shove it into the positive terminal of an electrical outlet and then stick the other side of the copper wire into the earth, will current flow??
  4. M

    Why Can Kirchhoff's and Ohm's Laws Be Applied in the S-Domain?

    I found some pertinent literature... http://www3.alcatel-lucent.com/bstj/vol04-1925/articles/bstj4-4-685.pdf
  5. M

    Why Can Kirchhoff's and Ohm's Laws Be Applied in the S-Domain?

    Can you elaborate on your first sentence? Everything else is helpful and made sense I think I may need to learn more about linear operations and how they affect their arguments
  6. M

    Why Can Kirchhoff's and Ohm's Laws Be Applied in the S-Domain?

    I am looking for a proof to why we can apply kirchhoffs laws and ohm's law in the s-domain. If anyone has an intuitive explanation or possibly knows of a link explaining it that would be awesome. Thanks
  7. M

    Is the Earth Ground Cable Essential for Circuit Operation?

    They state that the Earth ground cable connecting ground to the neutral wire inside the transformer is a feedback path for electrons. From that information I would conclude that without it the circuit would not be complete and current wouldn't flow. Then they follow by saying that the use...
  8. M

    Laminar flow fixed parallel plates

    Ok, I get it now. I didn't see the step of bringing that equation back into the PDE's. I was also confused on how the dp/dx was treated as constant wrt x but on the following page it shows that dp/dx is in fact constant and related to the viscosity and spatial properties. Thank you.
  9. M

    Laminar flow fixed parallel plates

    http://books.google.com/books?id=p7WsoU-CfPkC&pg=PA224&lpg=PA224&dq=6.132+fluid+mechanics&source=bl&ots=7q6rcCGewf&sig=EvcrqTJCxqLSPbKrkiztkPS4I6Q&hl=en&sa=X&ei=6vo6UYusIenFyAHHt4GYAQ&ved=0CDoQ6AEwAw#v=onepage&q=6.132%20fluid%20mechanics&f=false Can someone please tell me how they arrived at...
  10. M

    Lower and Upper bound proof in R

    I am getting lost in the proof in the 5th line when it says there are 10 numbers that have the same kth digit as x. Why 10? I don't understand where this number is coming from and it doesn't seem arbitrary. the rest of the proof...
  11. M

    Trouble Understanding Indexed Union of Lines in the Plane

    The definition of In is on the next link. In is a subset of R2 and is the line of equation y=n. I have to admit for some reason I was stuck on thinking this was an intersection. Thinking about it some more I have realized that the individual sets of the indexed union each contain a line. Those...
  12. M

    Trouble Understanding Indexed Union of Lines in the Plane

    I am having trouble understanding how the indexed union of ln in the first picture is equal to a subset of the plane; an element of it is a point on one of the lines. If I were to choose say 0 1 2 then the indexed union should be y=0 union y=1 union y=2. These lines would have no points in...
  13. M

    MATLAB Why is my integral function not working properly in MATLAB?

    syms y int(2*y*(sqrt(1-(y-1)^2)),y,0,2) I plug this into MATLAB and I get the answer is negative pi. The entire integration region is positive. How is this possible! what the heck is going on? Just noticed that if I set the limits to 0.00001 and 1.99999 it works perfect. Can someone explain this
  14. M

    Thin wall Pressure Vessel(cylinder)

    cylindrical pressure vessel with inner pressure P. Take a infinitesimal cube on the inner-wall of the vessel. When calculating the normal stress along the radial direction it is assumed that that it is equal to P on the both the negative \widehat{r} and positive \widehat{r} directions...
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