01
Pressure · Bernoulli
Why does blowing over paper lift it up?
The air above drops in pressure. The still air below wins.
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02
Pressure · Atmosphere
Is a straw really sucking your drink up?
Your mouth lowers pressure. The atmosphere does the lifting.
03
Water · Surface tension
Why does a steel needle float on water?
Water molecules pull together at the surface and hold the line.
04
Pressure · Thermodynamics
Why does a pressure cooker cook faster?
Trapped steam raises pressure, so water boils hotter.
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