How much saliva did Louis Armstrong empty from his trumpet during his career? (Thanks to Delaney Wright, Olivia Reel and Halina Garraway of my Oklahoma Scholar-Leadership Enrichment Program (OSLEP) class for suggesting the question.)

How much do buildings lengthen the day by increasing the Earth’s rotational inertia?

Look for the answers online at tpt.aapt.org. Question suggestions are always welcome! For more Fermi questions and answers, see Guesstimation 2.0: Solving Today’s Problems on the Back of a Napkin, by Lawrence Weinstein (Princeton University Press, 2012).

Supplementary Material

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