Showing posts with label boiling. Show all posts
Showing posts with label boiling. Show all posts

Thursday, January 21, 2016

Watch Water Droplets Travel Uphill






1. This is ordinary water, just traveling uphill of its own accord. See?







2. Here it is in slow motion.




The trick is that the surface is much hotter that the water’s boiling point, so a layer of vapour forms underneath the droplet letting it keep its shape. It’s called the Leidenfrost effect. Then the texture of the surface propels the droplets in one direction only.





3. Scientists at the University of Bath took advantage of this effect to make a maze that water droplets could navigate.





Read more: http://buzzfeed.com/kellyoakes/watch-water-droplets-travel-uphill




Watch Water Droplets Travel Uphill

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Friday, February 6, 2015

This Is What Happens When You Boil And Freeze A Liquid At The Same Time




Yes, it’s real.

1. This video shows what happens when you get the temperature and pressure of a liquid just right…


Video available at: http://youtube.com/watch?v=XEbMHmDhq2I. youtube.com

2. So that at first it freezes.


This Is What Happens When You Boil And Freeze A Liquid At The Same Time

View this image ›


Tom Enstone / youtube.com

3. Then it boils.


This Is What Happens When You Boil And Freeze A Liquid At The Same Time

View this image ›


Tom Enstone / youtube.com

4. Then… it does both at the same time?


This Is What Happens When You Boil And Freeze A Liquid At The Same Time

View this image ›


Tom Enstone / youtube.com

5. This (unspecified) liquid appears to have reached its “triple point”, where it exists as a solid, a liquid and a gas at the same time.


Liquids start behaving strangely around this temperature and pressure. For example, below the triple point pressure, when ice is heated it turns directly into water vapour without first becoming a liquid.


6. Which is pretty neat.


This Is What Happens When You Boil And Freeze A Liquid At The Same Time

View this image ›


Read more: http://buzzfeed.com/kellyoakes/this-is-what-happens-when-you-boil-and-freeze-a-liquid-at-th




This Is What Happens When You Boil And Freeze A Liquid At The Same Time

boiling, freezing, science, triple point