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    Engineering Stress increases after yield stress?

    Yes, thank you both for your insight. I asked the instructor also, and the answer he was looking for was regarding the cold work/strain hardening that occurs as a result of dislocations from the plastic deformation.
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    Engineering Stress increases after yield stress?

    The question is: "From the onset of plastic deformation up to the UTS, the engineering stress increases. Discuss in Engineering terms why." This is for a lab report in which we performed a tensile test on three materials, steel, copper, and aluminum
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    Engineering Stress increases after yield stress?

    I need to know why the Engineering stress increases after reaching the yield stress point, and continues to increase until reaching the UTS. Am I correct when I remember that there is strain hardening that occurs along the region from Yield stress to the Ultimate tensile stress? Engineering...
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    Chemical PCP found in older Electrical Transformers

    Thank you for the clarification! So this "flame resistant heat transfer compound" isn't necessary in newer models then? Why were they replacing the PCB-containing transformers?
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    Chemical PCP found in older Electrical Transformers

    I worked for the Public Utilities company last summer, and we were tasked with taking inventory around the entire city, of all the transformers. We wrote down as much info as we could about the transformers, including Serial Number and whether or not it contained PCP's. From what I understood...
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    Velocity of Fluid flow due to gravity

    I had been looking into Manning's Equation and was planning on asking my instructor today about how it would relate. I have never been exposed to it until now, so I am a little confused about how to use it correctly. I understand there is a unit-less coefficient of roughness in the equation as...
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    Velocity of Fluid flow due to gravity

    Thank you for your input. For our purposes, in this project we are assuming the height in the tank is constant, as you said. This will ensure a constant pressure at the bottom of the tank, in theory keeping the flow of water constant. I originally thought I could use the kinematic equations of...
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    Velocity of Fluid flow due to gravity

    I am designing a system for an engineering project at school. It's essentially a clock to be powered by water turning a mechanical system of gears (not generating electricity). Imagine a rectangular basin full of water placed at some height above the ground. There is a hole in the bottom...
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