Recent content by Andronicus1717

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    How Can You Solve the Geometric Series Expansion for \(\sum n^2 x^n\)?

    Thank you, your responses have been very helpful! Stephen Tashi: The infinite series is what I was looking for. Next time I will try and better use the equation syntax.
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    How Can You Solve the Geometric Series Expansion for \(\sum n^2 x^n\)?

    I need to find the solution to the geometric series expansion of the form... \sumn^2*x^n , for n=0,1,2,... most resources I've found only have answers for n*x^n or n*x^(n-1). I have no idea how to calculate this, so I was wondering if there's a book out there that has massive lists of...
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    Understanding How Seals Work on Autoclaves

    How does the seal work on a large resealable high pressure vessel such as an autoclave? example: http://gust.engin.umich.edu/autoclave2.jpg If you look at the example above you always see the rotatable bayonet ring attached to the vessel. The red ring is probably the o-ring face seal on...
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    Cooling High-Temperature Copper Conductors

    Are the tubes insulated? If they aren't, you may not even need a coolant gas? Free convection or forced convection on the outside of the tube may take care of the heat problem. Just the resistances from first entry at http://www.stormcopper.com/CopperTubing.htm gives me about 4.5 Watts per...
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    Cooling High-Temperature Copper Conductors

    That is a long tube! What is the inner diameter of the tube? Does the setup require only 1 inlet and 1 outlet or is there room for supplementary inlets and outlets along the length of tube? With that length of tube you are going to run into large pressure losses due to friction along the...
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    Cooling High-Temperature Copper Conductors

    I think more information is needed to get a good answer to your question... heat flux? is it localized? required response time? You mentioned SF6 so do you truly need a nonconducting material? Water is a typical coolant for induction heating coils which sound similar to what little you've...
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    Sensitivity of Isotopic Separation Techniques

    Perhaps I misunderstand. Should the answer be "depends on the technology" whether or not it is viable method for said notable materials? i.e. chemical property differences instead of pure mass separation techniques? Would not Boron-10 separation be of concern since Boron-11 is a potential...
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    Sensitivity of Isotopic Separation Techniques

    Understandably so, certain isotopic separation techniques are going to be sensitive (U-235, U-233, Li-6) because of their relationship to nuclear weapons. Would any other isotopic separation techniques fall under the wing of any regulating agency in the United States (NRC, NNSA, etc.)? For...
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    Elastomer Mechanical Properties

    Specifically I'm looking for a resource that can provide me with basic material property information for common elastomers such as Neoprene(R) for the purposes of flat gasket joint analysis. Stress/strain curves and other such data would be very helpful. I understand that elastomers material...
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    Free books about Nuclear Physics

    http://www.oism.org/nwss/ Nuclear War Survival Skills by Cresson H. Kearny Not only is it free, but I believe it to be the most comprehensive reference book available.
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    Liquid Sodium Cooling Loop Piping Material

    What materials can be used for the piping in liquid sodium cooling loops (primary and secondary) and for the heat exchanger?
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    Calculating amount of fissionable material needed for reactor

    Re: 1) The reactor in question could be using weapons grade Uranium. Such is a political concern and not an engineering requirement.
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    Calculating amount of fissionable material needed for reactor

    The energy released from one fission of U-235 is ~200 MeV (Total energy - Neutrinos) http://www.tpub.com/content/doe/h1019v1/css/h1019v1_85.htm Plus there are efficiencies you might want to include in the calc?
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    Cell Phones & Cancer: Examining Interaction Mechanisms

    The spectrum for cell phones is typically in the 850 MHz range. E=hv yields around 3.515E-6 eV. The lowest natural state electron binding energy is on the order of 10 eV >> 3.515E-6. Is this enough to dispel the "correlation"? Are there any other particle interaction mechanisms that would...
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    Lock washers what's the point?

    In a properly torqued bolt the tension in the bolt is much greater than that of the lock washer. It doesn't prevent rotation of the joint and doesn't spread out the force like a flat washer. So I ask, what's the point of a lock washer?
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