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Freeze water in an instant... and more Science Week magic*
IT’S SCIENCE WEEK 2012 ladies and gentlemen and the theme this year is Everyday Experimenting, so put on your protective goggles, fire up the bunsen burners, get out the graduated cylinders and start doing science!
This old chestnut… Mentos v Coke
The Science Week folks set us a little challenge and sent us the materials necessary to carry out the Diet Coke and Mentos experiment:
You need:
Do science:
What’s happening here?
When you drop the Mentos into the coke the carbon dioxide in the bubbles in the coke reacts with the porous surface area of the sweets. Due to the high surface area of the sweets millions of bubbles are released at once, resulting in a rapid gas release (snigger).
Here’s Weezer with a demonstration (at 0.32 to be scientifically precise):
YouTube/WeezerVEVO
Supercool water!
You need:
Do science:
What’s happening here?
When water freezes, ice crystals form around tiny impurities in the water. However distilled or purified water contains few impurities so the water doesn’t freeze at zero degrees Celsius, so when you disturb the super cooled water, it freezes instantly.
How strong is an eggshell?
You need:
Do science:
What’s happening here?
The dome shape created by cutting the eggshell is strong because it is made up of a number of arches, which spread weight placed on top of it evenly. The weight of the books placed on the eggshells is evenly spread and, voilá, they don’t break.
For more science madness visit ScienceWeek.ie>
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coke diet coke distilled water Education eggshells mentos mentos and coke School Science science week supercool water