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Why does water goes underneath an object, a sideways direction, in addition to falling downward?
Spill some water on a table or counter. Watch it go under the table/counter in addition to going off the edge.
And it doesn't just go under and fall, it goes under and hangs there upside down until a drop forms (IF a drop forms)
I must've missed this in science class.
I think it's something to do with surface tension or something like that.
the force of gravity pulling down on the drop of water is less than the force required to break the surface tension of the water.......or something like that.
He got it! (Doing best "Tech Sargeant Chen" from "Galaxy Quest").Quote:
Originally Posted by Grimey
Tension cohesion? but how does water make it to the tops of very tall trees?
You gotta be kidding :?Quote:
Originally Posted by ZAPPER
What?Quote:
Originally Posted by ZAPPER
http://hyperphysics.phy-astr.gsu.edu/hbase/surten2.html
Bubbles... surface tension ... capillary action
does water defy gravity?
Check out a century old self operating (no electricity) pump that can push water as high as 65 feet up with only a small moving water source needed.
http://www.motherearthnews.com/library/1977_January_February/The_Mitchell_Float_Pump
water defies gravity because I will it that way. I didn't want to make it sound like I was really that powerful, nor seem like a show off. I willed it that way for the same reason I created ostriches. It was something to do, and why the heck not. :P
Never. It can resist gravity with the right surface or conditions. Even if you give a bird a drink or serve in-flight drinks with ice, that water is coming back to earth one way or another. :wink:Quote:
does water defy gravity?
Blame electromagnetism.
Why does a spinning top upright itself from horizontal? Things that spin seem to counteract gravity.
Water can do this as the molecules are cohesive. This is due to hydrogen bonding between molecules. This is also why it has such a high boiling point for such a small molecular weight.
The cohesive properties of water are what makes it possible to be a liquid.
If it wasn't so polar an oxygen with two hydrogens would surely be a gas.
Happy Turkey Day.
http://www.lsbu.ac.uk/water/hbond.html
This explains a lot.
did you know you can walk on custard? :eek:
This all makes more sense now. :)
Thanks.
Ya see? Simple, isn't it?
It's balance is centrifuged. By spinning it, you're causing it to create it's own gravitational balance. you can virtually place any focued point on the tip of a needle, and the gyration force wil distribute the entire weight to that point, However, the mass is still subject to gravity, so if you remove the pin, the spinning top will still fall, but will not change position in its fall (until it's impact with the ground). If you were in space, and had 2 spinning tops floating in mid air, each top's gravitational palance can cause it to attract to the other spinning top. It way cool.Quote:
Originally Posted by mattso
Another Fun Science experiment. Take the front tire of a bicycle, and spin it while holding it verticle. Stand on a lazy susan, or flat on the ground. Tilt the wheel left or right. If on the lazy susan, you'll move left or right. If on the ground, you'll feel the force pushing you left or right.
ALL THIS BECAUSE I WILLED IT!!!!!!!!!!!!!!!!!!!!!
I still think I made the giraffe's neck too long.
[end thread jack]
one word.Dipoles.
Hello!! I smell Lamarck's Theory of Inheritance of Acquired Characteristics :lol:Quote:
Doramius wrote:
I still think I made the giraffe's neck too long
:lol: yeah, well......... :oops:Quote:
Originally Posted by offline
Does water defy gravity????
Certainly does when it's frozen...
http://news.bbc.co.uk/1/hi/uk/3046791.stm
James Dyson's uphill water feature has been the striking image of this year's Chelsea Flower Show. But how did he do it?
It certainly beats your common or garden water feature.
Inventor James Dyson, he of the bagless vacuum cleaner, has stolen the headlines from the gardeners at this year's Chelsea Flower Show with his "Wrong Garden".
A set of four glass ramps positioned in a square clearly show water travelling up each of them before it pours off the top, only to start again at the bottom of the next ramp.
It is a sight which defies logic, and has become probably the most memorable image of this year's show.
Mr Dyson says his inspiration was a drawing by the Dutch artist MC Escher (he of Gothic palaces where soldiers are eternally walking upstairs, and of patterns where birds turn into fish).
read more at the link above
http://newsimg.bbc.co.uk/media/images/39247000/jpg/_39247317_grab.jpg
There is a way to make water travel uphill, but you just have to create a stronger downward force of pressure. We Did this to drain a pool once. However, you must absolutely never lose the vaccum inside the hose, otherwise all is lost. We just got a simple pipe valve to help keep water from flowing backwards.
I don't have pictures, but hopefully you can get the idea.
You need a long a** hose. We sealed 200ft of hose (2X100 FT. hoses) together. We couldn't find a 200ft hose on its own. It was a 9 1/2ft deep pool. the road was about 50ft away (we drained the pool down the roadside gutter). We made a coil of hose around 4X8'tall yard stakes & bolted some 2X4s to keep the stakes 2ft apart in a square. This took a while to do, but it turned out prettty good. We ran the hose through wide chain links to hold the hose up on the stakes. So we had about 60ft. of hose from the bottom of this coil going to the road, & about 20ft of hose from the top going into the pool with a pipe valve at the end to prevent a backflow, & 120ft of hose in a coil near the pool. First we ran water backwards into the pool to create the pressure & remove the air. Then disconnected the hose from the outside tap, and ran to the street. Damn, that pressure was pretty strong right off the back. It was pretty cheap to setup, but it took a bit of time to put together. It also took a little more than a day to drain. There was less than 4" of water left in the very bottom of the pool. We just used some 5gal. buckets to scoop most of it up. Then we broke out the bottom and tore out the sides. Now the pool is a Large garage with in-law apartment over the top.
ANyway, we created a stronger downward force causing the water to litterally flow upward from 9 feet lower than where we were draining the water to.
hmmm - that is called siphoning and not the same thing at all ... it is not the pressure outside - but the suction inside the system that pulls (not pushes) the water ..
Isn't suction just unequalized pressures? If you tried that trick in a vacuum it would fail. You need outside air pressure, pressing on the pool of water in the 1st place right?Quote:
Originally Posted by BJ_M
The siphoning will work as long as, basically, the vacuum is less (or pressure is greater) than the vapour pressure of the fluid.
See the Bernoulli's equation section at http://en.wikipedia.org/wiki/Siphon
Water (or any other liquid) will try and achieve a level surface. Another way of stating this is that water flows downhill. The goal of siphoning is to give the liquid a path from one container to another. Since it has to flow briefly uphill, the way to do this is to have a closed tube full of water, and then the weight of the liquid on the downhill side of the tube will be greater than the weight on the uphill side, and gravity will do it's thing. This is an over-simplification, but it holds until the uphill side gets into many feet of height.
the issue above originally was water flowing UPHILL in a non closed system .... the oppisite of a siphoning set up ...
True, my method is siphoning. But it is still a movement of water uphill due to the stronger downward pressure.
It's actually not hard to defy many laws of nature. Offset of natural balance causes this to happen very easily.
Does anyone else think I went a little overboard in creating the Platypus? I mean, I ran out of ideas and starting gluing things together to create nature. :P
Depends... Did it come before or after the beaver??? :lol:Quote:
Originally Posted by Doramius