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Willow Demonstrates Techniques for Minimizing Effort While Inflating 260's (MP4 - 720p)
Willow wants to blow up a standard entertainer balloon, called a "260" because it inflates to 2" diameter by 60 inches long. she tests the psi required to inflate it by air pressure alone, and then investigates how much less is required to inflate it by pulling lengthwise to weaken the site of the first bubble. finally, she tries to blow one by mouth.
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