April Fools: A Fermi Problem

After hearing several hours of lecture from Dr. C.Y. Chien on “Order of Magnitude Estimation Problems,” we felt we owed him one. We invited Dr. Chien and the physics department at large to make their own estimate: how many balloons does it take to fill the foyer in the main office?
(Team First-Year: I put everyone’s pictures and movie clips together in this zip file.)
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Continued…