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Squeezing a plastic bottle filled with water and a condiment packet makes the packet sink. Letting go of the bottle makes the packet rise. |
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By taking advantage of resonance, you can cause two pendulums to swing in identical cycles. |
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The person pulling on the rope will make the other two people come together, no matter how hard they resist. |
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This is a sieve that sorts objects by size. Its screens act as boundaries, allowing objects that are small enough to pass through and preventing the passage of objects that are too large. |
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A spinning rod with a mark near one end is set rotating and spinning at the same time. Amidst the blur of the spinning cylinder, the mark appears three times, forming a stationary triangle. |
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A bob, or mass, hangs from a string attached to the front of the walking men. Watch as the string almost draws the vectors that make the toy work. |
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