Interesting scientific phenomenon: Why can one person make a swing go higher and higher?

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How strong is the force of regular CPR? I feel like my ribs are going to break in the next second.

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They say diamonds are forever, but they can be burned and broken.

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Why do we need to grind off the bark? This is the process of peeling and rounding the wood before pe

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Why do we need to install a wellbore when digging a well? #Science #Unzip #IncreaseKnowledge #Diggin

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Far more than the average family car? A palm-sized inline four! The whole process of assembly!

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High voltage toys 2

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An animation that has won numerous awards worldwide! "A terrifying cautionary tale"

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Violent gyro (10KG)

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[DIY]How I recycle the clay in my studio

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If you often watch videos, you don’t know how terrible the job of a porn appraiser is!

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Today's stress-relieving video: an awesome mechanical series~

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Decompression video of the workers series!

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I advise you to quit porn (enlarging testicles)

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Two mods to make your Minecraft more realistic

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Make song with "Sound of Black Holes" & Einstein and Hawking speeches

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What a zombie moon looks like

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Convex lens experiment

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High IQ crime, the battle between mathematical genius and physics genius

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Interviewing the first candidate caught cheating in the college entrance examination in 2020, I neve

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