The first precise pendulum clock imported into North America failed to keep accurate time. How much does the local variation in effective g affect time keeping?

When we order coffee pods, we now receive a large envelope to send the used pods back for recycling. Should we recycle the pods? (Thanks to Sebastian Kuhn of Old Dominion University for prompting the question.)

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).

AAPT members receive access to The Physics Teacher and the American Journal of Physics as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.