Assertion: brownian ratchet | /r/CapableOf | extract useful work
Facets:
value: from brownian motion
type: LOCATION
value: at first sight
type: MANNER
Source sentences:
text: Although at first sight the Brownian ratchet seems to extract useful work from Brownian motion, Feynman demonstrated that if the entire device is at the same temperature, the ratchet will not rotate continuously in one direction but will move randomly back and forth, and therefore will not produce any useful work.