How to get some liquid out of a bottomless bottle without turning it?
A simple do-this-at-home experiment
This Instructable is based on an accidental observation.
It might take a scientist to find things like this funny, but maybe you do as well.
And given, you are working in theoretical or experimental physics: can you give a sound explanation of this phenomenon?
When I was playing mindless with a nearly empty, reclosed PET (!) orange juice bottle, it fell screw cap-down on the table. I then saw the residual liquid in the cap jumping up when the cap of the bottle hit the table.
Not really surprising as such, but it does in a single, narrow, staight column, reproducibly. I have been using my mobile to document the process (see images).
As an experiment with a Pepsi bottle showed, it is working even better if a bottle with a smaller screw cap is used. Here the liquid column can hit the top (former bottom) of a larger bottle. Or, if you remove the bottom of the bottle,it will spash upwards, reaching estonishing heights.
What could you do with it:
You may use this phenomenon to trick somebody (preferentally parents or teachers) or you may place a bet that you can remove/get some of the liquid from the bottle without turning it or touching the liquid.
Some may make a drinking game out of it.
- Take a empty PET bottle. Remove the bottom with a knife or a pair of scissors.
- Fill a few milliliters of some (colored) liquid into it (amount to be optimized for the individual bottle).
- Hold the bottle at least 1 meter above a hard ground. Carpet floor will not work.
- Release bottle.
Depending on the liquid, you may either try to fetch it, or you better remove your head.
Have fun playing.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Open Bottles: Example 1
Trying to be able to see what is happening in the cap of the bottle and how high the liquid can splash, I removed the bottom of the bottles. Interestingly, using a 1.5 ltr Pepsi bottle, parts of the liquid were splashing higher then the starting height of the fall. You can have a look on the realtime movie, but you will see more details on the individual images.
Step 2: Open Bottle: Example 2
Here I used an orange juice bottle with the bottom removed. Please have a look on stills and movie.
Step 3: Reproducibility: the Same As Before
Just to show that the phemomenon is quite reproducible:
compare these with the images on the first step.
This just has been another try.