Recent content by esc1729

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    Three question on error-propagation and flow measurements

    I’m calculating a discrete integral from distinct water-flow measurements. That means I have a few thousand data values in liter/second and I calculate from them the totally flown water in liter. The accuracy of the data is +/- 0.5 liter and I get one value every 5 seconds. The total time of...
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    Orbital radius vs period question

    You may consider to use http://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion#Third_law". Erich
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    G(x) is twice differentiable where g(4)=12 and g(5)=18. g(6)=?

    Yeah, I've just realized. It's quite some time since I'm out of school and we had no multiple choice tests then ...
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    G(x) is twice differentiable where g(4)=12 and g(5)=18. g(6)=?

    Your function must be monotone increasing and concave for all x. So an exponential function comes into mind. As you have two constraints, try g(x) = a exp( bx). Solving this for your two x values will lead to a very simple result with indeed g(6) = 27. Erich
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