Why are gravity bongs called gravity bongs?

[kozmic_blues]

Since gravity has nothing to do with it. Why aren't they called vacuum bongs?

Sorry, I'm bored.

[eleven357]

Gravity has everything to do with it.

[its_money]

why doesnt the water stay in the bottle when your pulling a rip einstein.

[thesoftparade]

gravity pushes the water back down..

[Houston610]

I've never put any thought into how they work. I just know that they fuck me up. I took my first gravity bong hit over the summer. I damn near passed out.

[enjoythesilence]

actually the OP is right, gravity has nothing to do with a gravity bong. its all about high and low pressure areas. also water doesn't move in a gravity bong....water isn't being pushed or pulled. i think what you guys are thinking of are waterfall bongs...in which case the gravity is pulling the water out the bottom of the bottle, but it still works on the same high/low pressure principle.

[Houston610]

Originally Posted by enjoythesilence

actually the OP is right, gravity has nothing to do with a gravity bong. its all about high and low pressure areas. also water doesn't move in a gravity bong....water isn't being pushed or pulled. i think what you guys are thinking of are waterfall bongs...in which case the gravity is pulling the water out the bottom of the bottle, but it still works on the same high/low pressure principle.

I have never heard of a waterfall bong. What is that?

[eleven357]

Originally Posted by enjoythesilence

actually the OP is right, gravity has nothing to do with a gravity bong. its all about high and low pressure areas. also water doesn't move in a gravity bong....water isn't being pushed or pulled. i think what you guys are thinking of are waterfall bongs...in which case the gravity is pulling the water out the bottom of the bottle, but it still works on the same high/low pressure principle.

For the record, the waterfall bong is a variation of the gravity bong. If gravity wasn't involved, what would create the vacuum?

[enjoythesilence]

http://www.youtube.com/watch?v=391EZpEnCl8

[eleven357]

If there were no gravity on earth, gravity bongs wouldn't work. If you can't understand that then you will be debating this for the rest of your life.

[enjoythesilence]

Originally Posted by eleven357

For the record, the waterfall bong is a variation of the gravity bong. If gravity wasn't involved, what would create the vacuum?

yes i do know that a waterfall is a variation on the grav.

but if we're talking about the original grav, where you have a bucket of water, a 2L bottle with the bottom cut out, and you pull it up to draw the smoke in, gravity doesn't have anything to do with it.

this is how the vacuum is created...
when you pull up on the bottle, you are increasing the volume of air between the water and the bowl. this creates a temporary low pressure area (or what you might call a vacuum). the higher pressure outside rushes into the low pressure area to keep the pressure constant. that rush of air pulls (or rather pushes) the smoke into the bottle. thats like simple high school physics....

[eleven357]

Originally Posted by enjoythesilence

yes i do know that a waterfall is a variation on the grav.

but if we're talking about the original grav, where you have a bucket of water, a 2L bottle with the bottom cut out, and you pull it up to draw the smoke in, gravity doesn't have anything to do with it.

this is how the vacuum is created...
when you pull up on the bottle, you are increasing the volume of air between the water and the bowl. this creates a temporary low pressure area (or what you might call a vacuum). the higher pressure outside rushes into the low pressure area to keep the pressure constant. that rush of air pulls (or rather pushes) the smoke into the bottle. thats like simple high school physics....

You are failing to see my point. If there was NO GRAVITY what would create this vacuum? If gravity didn't exist to pull the water down to create the vacuum, it wouldn't work.

[enjoythesilence]

i think you actually fail to see my point.....where in a gravity bong (the one i explained in a setup above) does the water move? the water stays firmly in the bucket and the only movement is that of the bottle.

even without gravity (assuming you can keep the water in the bucket), this would still work because of the differences in pressure. this would not however work in a vacuum with no air because pressure relies on the densities of air particles in a certain volume.

now if we were talking about a WATERFALL like i stated above, then YES it would NOT work without gravity.....but i did clearly state in my explanation that this was not the method i was refering to if you read it correctly

[eleven357]

Originally Posted by enjoythesilence

i think you actually fail to see my point.....where in a gravity bong (the one i explained in a setup above) does the water move? the water stays firmly in the bucket and the only movement is that of the bottle.

even without gravity (assuming you can keep the water in the bucket), this would still work because of the differences in pressure. this would not however work in a vacuum with no air because pressure relies on the densities of air particles in a certain volume.

now if we were talking about a WATERFALL like i stated above, then YES it would NOT work without gravity.....but i did clearly state in my explanation that this was not the method i was refering to if you read it correctly

Yes the water is still pulled down towards the earth from the gravity that exists here. If there were no gravity, even with the bucket variation, when you would try to pull the 2 liter out of the water, there would be no existing force to pull the water down to create the vacuum. So yes gravity is the most important thing here.

I do understand the high/low vacuum concept, but again this would not work without gravity being present.

[enjoythesilence]

even without gravity, the water would only be pulled up with the bucket if there was an airtight vacuum between the water and the bowl. but seeming as there isn't, air would still be able to flow into the bottle, thus equalizing the pressure inside and the bottle would still be able to slide in and out without the water being moved. gravity is still a non-issue.

for an experiment, set up the bucket variation but instead of a bowl, put the cap back on. the water will be pulled up with the bottle this way. actually on second thought, you don't even need to do that. because it will work on the same principle as when you put your finger over the top of a straw. then you do that and pull the straw out of the cup, liquid stays inside. once you take your finger off, it doesn't. you can do the same with a waterfall. if you fill with water and cap the top, the water won't flow out the bottom.

yes, gravity pulls the liquid out of the straw and out of the bottle when the seal is removed, but even if there wasn't gravity, movement of the straw or the bottle would still cause the liquid inside to be removed from it. although moreso from the straw or the bucket grav because the hole in a waterfall is too small to remove the water quickly enough in a gravity-less environment