Assertion: fuel cell's output | /r/HasProperty | proportional
Facets:
value: directly
type: MANNER
value: to the purity of the hydrogen
type: TRANSITIVE-OBJECT
value: to the area of the electrodes
type: LOCATION
Source sentences:
text: The current output from a single cell is directly proportional to the area of the electrodes.
text: It sounds like the greatest thing since sliced bread except there are present limitations: A single fuel cell produces just a fraction of a volt, so many fuel cells must be stacked together to produce the desired amount of electricity; The output of the fuel cell is directly proportional to the purity of the hydrogen.