The Fuel Cells Used Aboard NASA's Space Shuttles Are Electrochemical $\to$

question 22

Multiple Choice

The fuel cells used aboard NASA's Space Shuttles are electrochemical cells that generate electricity from which overall chemical reaction?

• A) Fe₂O₃(s)+ Al(s)\(\to\) Fe(s)+ Al₂O₃(s)
• B) Pb(s)+ PbO₂(s)+ 2 H₂SO₄(aq)\(\to\) 2 PbSO₄(s)+ 2 H₂O( )
• C) 2 NiO(O
• H)(s)+ Cd(s)+ H₂O( )\(\to\) 2 Ni(O
• H)₂(s)+ Cd(O
• H)₂(s)
• D) 2 H₂(g)+ O₂(g)\(\to\) 2 H₂O( )
• E) N₂H₄( )+ O₂(g)\(\to\) N₂(g)+ 2 H₂O( )

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Definitions:

Introjective Tests

Psychological tests that analyze an individual's internal thoughts, feelings, and other mental processes, often through projective techniques.

Rating Scales

Tools or instruments used to measure or evaluate the quantity or degree of an attribute or characteristic.

Observer Effect

The phenomenon in which the act of observation alters the behavior of the subject being observed, often considered in psychological research and quantum physics.

Experimenter Bias

A form of research bias where the expectations of the researcher unintentionally influence the outcome of an experiment.