Ceres
16-03-2009, 10:42 AM
I haven't tried this one yet... but it's essentially 2 x 2L soft drink bottles, attached neck to neck, with a plastic tube going towards the end of each bottle. The instructions say you need...
A plastic sleeve into which one screws two empty 2-liter soda bottles. (I'm wondering if I can rig this up by connecting the 2 lids together)
Inserted into this connecting tube are two clear plastic "straws", one extending toward the bottom of each bottle. Fill one bottle 3/4 full of water, colored if you like, invert the duo, and watch water spew from the top end of the top "straw"
It's all because of the vacuum created as water drains from one bottle to the other, and is a good physics demonstration item. But it looks as though the water defies gravity.
I reckon I could get the 2 lids, drill a hole through the middle, tape them together, and stick a plastic tube through the middle.. we're going to try this and see how it goes!
A plastic sleeve into which one screws two empty 2-liter soda bottles. (I'm wondering if I can rig this up by connecting the 2 lids together)
Inserted into this connecting tube are two clear plastic "straws", one extending toward the bottom of each bottle. Fill one bottle 3/4 full of water, colored if you like, invert the duo, and watch water spew from the top end of the top "straw"
It's all because of the vacuum created as water drains from one bottle to the other, and is a good physics demonstration item. But it looks as though the water defies gravity.
I reckon I could get the 2 lids, drill a hole through the middle, tape them together, and stick a plastic tube through the middle.. we're going to try this and see how it goes!