Remember the Mentos Coke geysers?
Okay this is better. This is so cool that, well, you just have to see it.
I found this on BL Ochman’s blog (she looks at the marketing end, not science) and the rest of the site looks extremely cool.
One very fun thing to notice in the video is the swinging pop bottles. Why? Physics of course! Note how the bottles swing with all the energy shooting out the top.
Now, could you make a rocket from this little experiment? Yes, certainly. Here’s the sticky part (pun intended), you have to engineer a way to keep the Mentos and the Coke apart until you’re ready to launch. I can think of several ways to try this … but boy the failures they would be a mess. Have a hose handy for sure!
Tags: Mentos, Coke, Mentos Coke geyser
6 Comments
LOL I was like where the heck is that music coming from?!
I heard about this the other day from mike and didnt believe it until I had seen it, the boys at his work decided to try it and it does work
I can’t wait to actually try it. My daughter has been bugging me for months! Though I did tell the counselor at her day camp … lol!
Me and my friends tried this and were moderately entertained for like three attempts. But being engineers, we thought “I wonder what would happen if we capped the bottle?”
http://www.CokeRockets.com was born
Pretty cool. So what was that thing you lit in the video?
[...] So what’s happening to get a ten foot geyser is a cascading reaction with the three components and the Mentos to release a lot of CO2 all at once. Great, but why. Nucleation. Nucleation is, like I’ve talked about before, the reaction between the surface of the object and the liquid to encourage the CO2 out. The rough surface of the candies gives the CO2 something to cling to and then release. Because the candies are heavy they sink to the bottom where they force the reaction in the greatest volume of liquid and giving the CO2 lots of space to push out … and hence the geyser! [...]