https://projectlab.engphys.ubc.ca/10635/2011-apr-question-7-concrete/ Sun, 10 Nov 2019 03:20:52 +0000 hourly 1 https://wordpress.org/?v=5.2.5 https://projectlab.engphys.ubc.ca/10635/2011-apr-question-7-concrete/#comment-27603 Sun, 10 Nov 2019 03:20:52 +0000 https://projectlab.engphys.ubc.ca/?p=10635#comment-27603 very cool

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