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Engineering, 05.02.2021 21:50 Olaf2018

The tip of a thumbtack has a diameter of approximately 0.3 mm. You place the tip of the thumbtack against the skin of your arm, and balance a medium-sized apple on the flat head of the tack. Will the weight of the apple provide sufficient compressive stress (direct pressure) on your skin to puncture it

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The tip of a thumbtack has a diameter of approximately 0.3 mm. You place the tip of the thumbtack ag...

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