The tutor illuminates a very plain, yet critical, concept from physics. Average velocity has the following definition: vave=displacement/time Displacement means your change in position. (Read more about the difference between distance and displacement in my post here.) Travelling straight-line, displacement …

Physics: average velocity Read more »

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The tutor continues with some explanation of last post’s Perl random walk simulation. Below is the Perl code from last post, this time with some comments (recall that # denotes a comment in Perl): #!/usr/bin/perl # needed for Linux (Unix) …

Perl random walk simulation: code explanation Read more »

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The tutor reflects on summers past as he discusses his latest identification. I recall, growing up in the Annapolis Valley, Nova Scotia, a tree with deeply furrowed, dark grey bark, and compound leaves whose leaflets were rounded, not pointed. It …

Field guides, old memories: tree identification Read more »

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