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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Tuesday, 03-Apr-2018 12:02:01 UTC Stephen Sekula A cinder block weighs about 32 pounds. A breaking force of about 1000N is required to shatter the material. Concrete. Airbag. #PHYS1303 https://twitter.com/drsekula/status/981138296943382534/photo/1 https://chirp.cooleysekula.net/attachment/49541