Recent content by abri

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    High School Why is Fire Considered Conductive?

    Thanks! Do you know if the ions are generated by collisions, or if they come from some part of the chemical reaction? Certain chemical reactions create ions during the reaction when electrons move around, even though both the reactants and products have neutral charge. Since the flame goes...
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    High School Why is Fire Considered Conductive?

    Hi Why is fire conductive? Have encountered several examples where fire is used as a conductive material in high voltage demonstrations. However I've never gotten a straight answer as to why. Some sources claim fire is a plasma, but that's not true. The flame of a candle is not hot enough to...
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    Undergrad Vulcan howl - aerodynamic calculations

    Hi guys and girls! Here's a hard one I need help wit. I really want it resolved because I sincerely love it. There's an aerodynamic phenomenon called 'the Vulcan howl'. Example: It occurs when engines are employed at maximum power or more (maximum power in aircraft is only a recommended...
    • abri
    • Thread
    • Aerodynamics Calculations
    • Replies: 2
    • Forum: Mechanics
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    Age of radioactive sample, single variable equation.

    Thank you!
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    Age of radioactive sample, single variable equation.

    Thanks! I couldn't remember where to begin but now I do. ln(x) = y if x = e^(y) Would the solution be this? ( ln(Activity at time t) ) / (Activity at time 0) = −λt ( ln(Activity at time t) ) / ((Activity at time 0) * −λ) = t
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    Age of radioactive sample, single variable equation.

    I'm taking an introduction course for simple physics. All problems are solved with simple single variable analysis. My problem is that this is an introduction where you don't need any advanced math to solve the problems, but I can't remember how to solve the last equation. Would you mind helping...
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    Graduate Faster than Light - Summary Wanted

    Looks like I've found my excuse for not studying this summer-vacation either.
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    Graduate Faster than Light - Summary Wanted

    Thank you for an extensive answer, I'm unfamilliar with the "OPERA Publication". As soon as I've done my finals in June, I'll dive right into that.
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    Graduate Faster than Light - Summary Wanted

    So at this point there is no valid theory, not even the slightest hint, of traveling from point A to point B faster than light would in a straight trajectory (space folding and so on)?
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    Graduate Faster than Light - Summary Wanted

    Faster than Light travel is often discussed, but it seems that facts and fiction are often mixed together. (FTL not nessesarily from point A to point B at a velocity greater than C, just move object from A to B faster than light could travel.) To make it quick; there are some theories right...