Sublimating dry ice is covered with a soap bubble that
grows and grows (until it collapses!)
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When liquid nitrogen is poured in a container of soapy water,
a large amount of bubbles (and calamity!) are created.
This demonstration shows the pressure height gradient in a fluid.
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We look at whether a floating mass registers on a digital mass scale.
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A vortex cannon to launch smoke rings.
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