Could a powered venturi be generating perpetual motion?

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Offline thedoc

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Warren Ellyett asked the Naked Scientists:
   Is it possible that a powered venturi, such as a blade air fan, (Dyson AM08), is generating perpetual motion. eg beyond the air that the fan supplies there is additional air being drawn in which in combination is greater than the fan can supply ?
What do you think?
« Last Edit: 31/03/2016 08:50:02 by _system »