The Engineering of Droplets
William S. Hammack
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Bill Hammack explaining the difference between Betamax and VHS recorders
File:How a Film Projector Works.webm
Video of Bill Hammack explaining how a film projector works
William (Bill) S. Hammack (born 1961) is an American chemical engineer, and Professor in the Department of Chemical Engineering at the University of Illinois at Urbana–Champaign.
Hammack is well-known for his ventures in science communication as the persona Engineer Guy: between 1999 and 2005 he produced radio commentaries for Illinois Public Media, and starting in 2010, he produced a regular series of videos on YouTube explaining the engineering of everyday objects. He’s also one of the authors of the book Eight Amazing Engineering Stories.