No. 2170: Back of an Envelope
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Orders of Magnitude Fermi Estimates and Understanding Numbers This was my idea of a Fermi Question: Turn every experience into a question. Can you analyze. - ppt download
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TED-Ed - New TED-Ed lesson: How many piano tuners do you think there are in Chicago? Learn how you might make a good estimate. http://ed.ted.com/lessons/michael-mitchell-a-clever-way-to-estimate-enormous-numbers | Facebook
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