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>> TODAY WE'RE GOING TO

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LOOK AT ONE OF THE COOLEST

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PARTS OF HAVING EXPERIMENTS

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ON THE SPACE STATION.

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IT'S BECAUSE WE CAN

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SEPARATE ONE OF THE MOST

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DOMINANT FORCES-- GRAVITY--

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ON A LOT OF DIFFERENT MODELS.

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A GREAT EXAMPLE IS WATER.

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WATER IS PRETTY MUCH

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DOMINATED BY GRAVITY

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ON EARTH, BUT THERE'S OTHER

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FORCES AT WORK THAT

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IF WE UNDERSTAND BETTER,

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WE CAN HAVE A BETTER MODEL

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AND MAKE GREATER DISCOVERIES.

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THINGS LIKE SURFACE TENSION,

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CAPILLARY ACTION.

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I'M GOING TO SHOW YOU

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TODAY BY TAKING

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THIS WONDERFUL BOTTLE--

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REPURPOSED FROM A CONDIMENT--

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AND BLOWING INTO IT.

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WHEN I DISPLACE THE FLUID

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WITH AIR, IT WILL COME UP