How much snow falls on the U.S. each winter?
Arrows from English longbows could penetrate plate armor. What is the velocity of an arrow shot from an English longbow?
Look for the answers online at tpt.aapt.org under “Browse,” at the very end of the current issue.
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).