= Nancy Hall
{c}
<Nancy Hall> is an <aerospace engineer> whose NASA biography describes work on <fluid mechanics> in <microgravity>. She moved to the Fluid Physics Branch in 1994 and helped researchers use facilities such as a <drop tower> and reduced-gravity aircraft, as well as prepare proposed flight experiments.<Biography of Nancy Hall>[NASA Glenn, My Work Here at NASA]{ref}
In such work, understanding the scientific question and the apparatus are closely connected. A <microgravity> environment changes the relative importance of <gravity> compared with other forces acting on a fluid; an experiment must specify the conditions it actually achieves. Her described role linked principal investigators with engineering teams and ground-based facilities, helping translate a proposed measurement into an experiment. The institutional biography provides a historical account of this work rather than a statement of her current assignment.<Biography of Nancy Hall>[Fluid Physics Branch, ground-based facilities and flight-definition experiments]{ref}
https://www.grc.nasa.gov/WWW/K-12/DLN/descriptions/NancyHall.htm
\Image[https://www.grc.nasa.gov/WWW/K-12/DLN/descriptions/images/NancyHall.jpg]
{title=Portrait of <Nancy Hall>}
{width=240}
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