bubbles dr d adriaens what are bubbles? how do we make bubbles? we need......to make a solution...to...
Post on 21-Dec-2015
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![Page 1: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/1.jpg)
![Page 2: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/2.jpg)
BUBBLESDr D Adriaens
![Page 3: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/3.jpg)
What are bubbles?
![Page 4: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/4.jpg)
How do we make bubbles?
We need......to make a solution...to stretch the solution...and try not to pop it!
![Page 5: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/5.jpg)
An experiment... (1)
Let’s add together water (4 l), detergent (170 ml) and glycerol (15 ml).
The detergentwill DECREASE the
surface tension of the water.
![Page 6: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/6.jpg)
Heh?
What is surface tension?
Molecules attract.
In all directions in a liquid
But, differentat the surface!
![Page 7: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/7.jpg)
Oh....
![Page 8: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/8.jpg)
An experiment... (2)
And now, let’s blow bubbles!
![Page 9: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/9.jpg)
An experiment... (2)
And now, let’s blow bubbles!
![Page 10: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/10.jpg)
An experiment... (2)
And now, let’s blow bubbles!
![Page 11: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/11.jpg)
So, where else are bubbles used?...
![Page 12: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/12.jpg)
And?
These bubbles are much smaller than the previous ones!
Shall we make some more bubbles?
![Page 13: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/13.jpg)
An experiment... (3)
Now... How can we use it?...and I mean RIGHT NOW!
WARNING: LIQUID NITROGENis very cold (about -200°C!)
![Page 14: BUBBLES Dr D Adriaens What are bubbles? How do we make bubbles? We need......to make a solution...to stretch the solution...and try not to pop it!](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d625503460f94a4421a/html5/thumbnails/14.jpg)
An experiment... (3)
Risk assessment:
N2: only teachers can handle this! (i.e. Do not touch!)
Condensed milk, cream, flavouring, colouring, cones: edible – take care