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Bubble Machine
Bubble Blast Features: Massive dual fan output technology produces 100 s of bubbles per minute Secondary dual fan lift system forces bubbles to rise high into the air Easy top-load bubble liquid filling container Bubble liquid drainage valve system allows for easy clean-up Uses most types of bubble liquid On/Off switch on rear on unit Wheels and dual handles for easy transport Includes remote with Timer Control Specifications
Bubbles $7 per 64oz
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From Wikipedia A soap bubble can exist because the surface layer of a liquid (usually water) has a certain surface tension, which causes the layer to behave somewhat like an elastic sheet. However, a bubble made with a pure liquid alone is not stable and a dissolved surfactant such as soap is needed to stabilize a bubble. A common misconception is that soap increases the water's surface tension, soap actually does the opposite, decreasing it to approximately one third the surface tension of pure water. Soap does not strengthen bubbles, it stabilizes them, via an action known as the Marangoni effect. As the soap film stretches, the surface concentration of soap decreases, which in turn causes the surface tension to increase. So soap selectively strengthens the weakest parts of the bubble and tends to prevent them from stretching further. In addition, the soap reduces evaporation so the bubbles last longer, although this effect is relatively small.
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