Lyfish-inspired pumps

WASHINGTON, D.C., November 23, 2010 — To the causal aquarium visitor, the jellyfish doesn’t seem to be a particularly powerful swimmer; compared to a fish, it glides slowly and peacefully.
But for Janna Nawroth, a graduate student at the Californ…

Jump rope aerodynamics

WASHINGTON, D.C., November 21, 2010 — Jump ropes are used by kids for fun and by athletes for training. But what about the underlying physics? How do jump ropes work? Can important engineering principles be studied?
Jeff Aristoff and Howard Stone…

Air flows in mechanical device reveal secrets of speech pathology

WASHINGTON, D.C., November 22, 2010 — From a baby’s first blurted “bowl!'” for the word “ball” to the whispered goodbye of a beloved elder, the capacity for complex vocalizations is one of humankind’s most remarkable attributes — and perhaps one we…

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