Category Archives: Newton

Elegant Proofs – 1

Posted on 18/05/2008 by dougaj4

Roger Penrose in his book “The Road to Reality” gives a remarkably simple proof of Pythagoras’ Theorem: Drawing a perpendicular to the hypotenuse from the right angle (line CD) will divide any right angled triangle into two similar triangles, both … Continue reading →

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Playing with numbers

Posted on 15/05/2008 by dougaj4

A reader of Melbourne’s Herald-Sun newspaper has posted some data from the Australian Bureau of Meteorology, purporting to show a total lack of climate change, in spite of steadily increasing CO2 concentrations: Where’s the heat   Funily enough, when you … Continue reading →

Posted in Climate, Newton | Tagged , , | 2 Comments

Reinforced Concrete Section Analysis – 2

Posted on 15/05/2008 by dougaj4

Previous Post Pseudo-code for elastic analysis of a layered reinforced concrete section under eccentric axial load and pre-stress load:  Read data ‘For each reinforcement layer: Find area, first moment of area about top ,and depth of centroid. Find total reinforcement … Continue reading →

Posted in Beam Bending, Excel | Tagged , , | 1 Comment

Making light of gravity

Posted on 02/05/2008 by dougaj4

The man who fell sideways A matter of some gravity

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Evaluate Function

Posted on 22/04/2008 by dougaj4

It would often be convenient to evaluate a function entered as text; for instance if we have the function for the deflection of a cantilever under point loading at the end: F*L^3/(3*E*I) then it would be convenient to be able … Continue reading →

Posted in Excel, Maths, UDFs | Tagged , , | 9 Comments