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+--- Thread: Blobs of Water in Zero G (/thread-5680.html)
Blobs of Water in Zero G - Yazata - Jul 6, 2018
You can kind of see by looking that there's all kinds of mathematics about how the blobs of liquid vibrate. Then the astronaut inserts something like a seltzer tablet into the blob to make it fizz, without gravity.
https://www.youtube.com/watch?time_continue=1&v=bKk_7NIKY3Y
RE: Blobs of Water in Zero G - Magical Realist - Jul 6, 2018
Fascinating!!! Tks for that..
RE: Blobs of Water in Zero G - Ostronomos - Jul 6, 2018
Now that is interesting! You can see the blob dance as it bursts bubbles!
RE: Blobs of Water in Zero G - Zinjanthropos - Jul 7, 2018
I like how the blob jettisons a mini-blob at the 46 second mark. I wonder just how big a blob of water can get in zero G? Could a water blob have hit Earth in the past?
RE: Blobs of Water in Zero G - Yazata - Jul 7, 2018
Water molecules attract each other. Typically molecules are surrounded by other molecules and feel attractive forces from all directions. So they tend to clump together. The effect is especially pronounced for molecules at the surface, since there aren't any molecules attracting from beyond the surface. That creates a net inward force, that contracts the blob and acts like kind of a skin. It's 'surface tension' and it's why tiny insects can walk on the surface of pools of water here on Earth.
Here's a video in which they make bigger blobs of water and then put a camera inside a blob (no idea why). Later they show how the water is kind of sticky this is the essence of wetness and capillary action, and how it wants to adhere to surfaces and to the astronauts hands. So they can wet their hands on opposite sides of a blob and then pull their hands apart, stretching the blob.
https://www.youtube.com/watch?v=g_HEsZJrluE
RE: Blobs of Water in Zero G - Zinjanthropos - Jul 7, 2018
It's kind of how I imagine the BB when observing the blob and alka seltzer combination and resultant volatility. It's how I picture the singularity that supposedly unravelled to become the universe, especially after seeing that small blob ejected from the larger one.