For the covered ball launched at high speed, when I fit a parabola to the vertical part of the motion, I get an acceleration of 10.3+/-0.2 m/s 2.That's a little high, but I didn't work all that ...

Wegmans Food Markets has recalled its house brand of flour because it may contain small, blue polyurethane balls. ... Wegmans Recalls Flour Over Small Plastic Balls. February 20, 2013 / 1:33 PM ...

The small, black plastic balls protect water quality by preventing sunlight-triggered chemical reactions, deterring birds and other wildlife, and protecting water from rain and wind-blown dust.” ...