Coffee in space: International Space Station astronauts can enjoy espressos with zero-gravity cup

The video explains NASA's Capillary Beverage Experiment, focusing on capillarity, which is the movement of liquid into narrow spaces against external forces like gravity. It details how the binding force between water and a tube's wall creates a meniscus, pulling water upwards until equilibrium is reached. In space, capillary action helps move liquids, such as coffee, towards astronauts in low gravity environments.

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