Convection and Diffusion Demo: Hot and Cold Water
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- Опубліковано 19 сер 2016
- This is a demonstration of the mixing rate of dye in hot and cold water, through convection and diffusion.
This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.
Why does it happen faster in the hot water faster?
Could u please elaborate on that.
Both are convection - Neither is diffusion. In both cases the water is free to flow in relation to relative temperatures densities.
What kinda doctor are you? Ohhhh physics. Never mind! Hey doc you need more blue food coloring!
Does this mean that diffusion is convection at a low temperature or convection is diffusion at a high temperature? Where does advection fit in these demonstrations?
No. Density of water decreases as temperature increases, although very slightly. so, from lighter to most dense: hot water in flask, room temperature water in droplet, cold water in flask.
So when he first introduced the droplets, the colored water, having a higher density than hot water, wanted to sink to the bottom, while in the other flask, droplet water has lower density than cold water and it stayed on top. That's why there is more convection effect in hot than cold water.
Then you have that molecules in warmer fluids move faster. That's why there's more diffusion in the hot water.
As for advection, I'm not entirely sure, but a quick google search makes me understand that it is simply another term for convection, but meant to describe larger scale phenomena like in rivers, oceans, etc.
@@sharshabillian thanks 🙏🏽
Too bad he didn't use same water amounts.
😮😮
Lesson for US-children? 🤣😂