Recent content by dazzler77

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    How do cables bend and curve when fixed at two points?

    Thanks for the replies. The website http://calculuslab.deltacollege.edu/...1/7-A-1-h.html was very helpful. However I would like to have it start off horizontal rather than hanging, and curve around and be clamped below horizontal as well, like a "C" shape. maybe in some ways it's more...
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    How do cables bend and curve when fixed at two points?

    Hi I have a cable that is fixed at 2 points, and I would like to model the curve that it bends as the two points move together and further away. In one scenario, the cable is fixed at both ends (one above the other) like a "C". In the other scenario, both ends are also fixed in clamps, but...
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    Probability of sum of 5 independant random variables

    OK thanks! so I can say that my standard deviation is: sqrt(0.01^2 + 0.01^2 + 0.001^2 + 0.001^2 + 0.01^2) = sqrt(0.00302) =0.0174 = 1.74% So I now wonder what percentage of the system would be within 1.74%? could I say that 68% of results are within 1.74%. Can I figure out what 90% of the...
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    Probability of sum of 5 independant random variables

    Thanks for the explanation. I did learn some probability but I wasn't good at it at the time. I have a electronic circuit that amplifies AC signal. the first stage is an opamp with 1% resistors. the gain is -rf/rs. The worst case is that the rf resistor is 101% of it's value and the rs...
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    Probability of sum of 5 independant random variables

    thanks. I'm not sure I understand. Maybe I am asking wrong. I have a start value. say 100%, then I have an error of +/-1% Then I have an equal probability of getting from 99 to 101% If I independantly add another error of 1%, the distribution is like a triangle from 98% to 102%. So the...
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    Probability of sum of 5 independant random variables

    Hi. I would like to find out the probability distributions function of the sum of 5 independant random variables. They are a sum of errors: 1%, 1%, 0.1%, 0.1%, 1%. I think this is the convolution of all these. So the limits are +/- 3.2% I know the convolution of 2 square pulses becomes a...
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