Some dragonflies splash down on the surface of a lake and then fly upward, spinning rapidly...
Some dragonflies splash down on the surface of a lake and then fly upward, spinning rapidly to spray the water off their bodies. When the dragonflies spin, they tuck themselves into a "ball." They spin with a linear speed of 2.2 m/s and produce a centripetal acceleration of 290 m/s^2.
What is the radius of the ball they form?
Express your answer to two significant figures and include the appropriate units.
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