A simple model of a toilet tank illustrates how it flushes with no mechanical parts other than a flap.
Languages: English
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Falling to Earth Due to Gravity
The ‘monkey gun’ demonstration is a striking example of gravity at work, illustrating how all objects fall at the same rate, even if they’re not falling straight down.
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The Strength of Arches
Structures around the world rely on arches for support. Arches are extremely strong under compression, even in items as seemingly delicate as eggshells and lightbulbs.
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Mixing Oil and Water
When liquids are weightless, they form a sphere. Make a sphere of oil inside a beaker of water and alcohol.
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Weightlessness
In order to feel your weight, you have to feel the earth pushing against you. If you are accelerating toward the earth at a rate equal to the force of gravity, then you are weightless. These demonstrations illustrate this point nicely.
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The Electric Pencil
Build a simple electric circuit using a penicl stroke on a piece of paper to conduct the current.
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Spitting Sparks
Salt water and acids both conduct electricity. So what about saliva, which is both salty and acidic?
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Barrel Roll Science
It’s race time, and the Which will roll down a hill faster – an enpty barrel, or a barrel filled with a hockey player? Explore the science of rotating objects – the concept known as ‘moment of inertia’.
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The Shape of Soap Bubbles
Why are soap bubbles spherical, and what does it take to create a different shape?