Recent content by Enginator

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    Question for Engineerings/majors

    A few weeks ago, I would have given you the same list. However, I have an employee working for me that has both a mechanical and civil degrees, but started off as an electrical major. He switched to mechanical from electrical, because electrical didn't provide enough of a challenge for him...
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    How to build a scale model of a trebuchet?

    I just wanted to make sure that if any college kids were reading this that they didn't get any stupid ideas. I remember being a college kid and there was no telling what me or my friends would do given an intriguing idea. :)
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    How to build a scale model of a trebuchet?

    Flinging 200 gallon bladder of water? That's about 3/4 of a ton. I would think that you could seriously injur someone with that.
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    Calculating Horizontal Distance of Ball Bearing with Mass 11.0 g

    The energy expended by the spring to get the ball to that height will be the same energy in shooting it horizontally.
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    How do you design a bridge with these materials?

    Think "Triangles." Also, an object with a longer dimension perpendicular to the direction of bending resists bending better than a "flatter" object.
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    Calculate Water Displacement of 295ft Barge

    L = length, feet W = width, feet DH = draft height, feet R = 62.4 lb/ft3 (density of water) GW = gross weight, lb L x W x DH x R = GW Therefore: DH = GW / (L x W x R) This assumes a rectangular "squared off" bottom, with no slope to the hull bottom at all. If there is slope...
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    Calculate Water Displacement of 295ft Barge

    BobG has an emotional affinity towards concrete :smile: Ok, even if we considered concrete, the members would be so big that your payload would need to be reduced to accommodate the structure. There you go, BobG... :wink:
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    Galvanizing and cathodic protection

    Buried piping is often coated with bitumus to prevent galvonic contact with soil. It is not extremely effective. Cathodic protection is still needed.
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    Calculate Water Displacement of 295ft Barge

    Structural aluminum generally has a higher strength than regular old ASTM A-36 carbon steel, and about the same as high strength steel. The trade-off is fatigue and sometimes product compatibility. Aluminum does not really have a fatigue stress limit that if you stay under that stress, it...
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    Exploring the Dimensions: A Thought Experiment in Architecture

    I can think of one more slight variation. Think about moving completely in and out of the 2D world and what the 2D being would see. It would be something like a MRI, where only a cross section of your body is seen at a time. Of course, this thought experiment is slightly off. Remember that...
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    What is the role of infinity in physics and how is it treated?

    If you are standing a specified distance from a pretty girl, and incrementally move half your current distance toward her, it will hurt. Sorry. It was all I could think of.
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    Exploring the Dimensions: A Thought Experiment in Architecture

    I'm sure he is thinking of a 4th physical dimension rather than time. This 4th physical dimension to us would be similar to the 3rd physical dimension to a 2 dimensional being. A three dimensional being could, say, poke their finger in and out of the 2D world at various places, and at will...
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    Manhattan Project Impact: Positive & Negative Consequences

    Ya'll have missed one of the major legacies of the Manhattan Project. It left us a major nuclear waste clean up problem both at the Hanford site in Washington and Oakridge site in Tennessee. There's a little bit at Idaho National Labs as well. Billions of dollars are being spent to clean up...
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    A modern object described in ancient texts: Evidence of Time Travel

    That was hilarious. Had me going there for a while :smile:
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