dlq04

GOOD ONE Gene, have to pass it on.

valentine

You may have seen this before, but its so cute I couldn't help myself:

[media]http://www.youtube.com/watch?v=nGeKSiCQkPw[/media]

dlq04

If you want to see some crazy down hill narrow street jumping bicycle riding, check out the video I put in the Lance Armstrong thread.

Matt_in_VA

Okay, you engineers, scientists and smart ones, out there …explain this one! The frozen water bottle. Don't know why this happens. do you? Frozen Bottle of Water

NNY S2k

^^^^
Levi

Matt_in_VA

I don't fully understand this yet. But, I am thinking that it has to do with two factors:

1. A common misconception is that water freezes at 32*F or 0*C when in fact the mineral content of water can change it;s freezing temperature. In reality 32*F / 0*C is the temperature at which ice melts regardless of mineral content. The fact that this was bottled water that may have been purified could factor in.
2. It was an sealed bottle and therefore the air in the top of the bottle may have contracted due to the severe cold and thus created a vacuum of sorts. When this small amount of air is released into the water by turning it up side down and shaking it the air moving through the water creates a catalytic effect that allows the forming of ice crystals whereas the undisturbed water did not allow for the forming of ice crystals.

Can anyone out there that knows the real answer to this let us know ?

Levi, It gets cold enough where you live to duplicate this experiment. Please give it a try and let us know how it turned out. Thanks

AZS2KDancer

Here's an answer to the frozen water bottle mystery, that was posted about a year ago.



RAJ SAXENA 1 year ago

It is called supercooled water. If the water is extremely pure, as in has very little to no particulate in the water, there will not be any nucleation sites in the liquid, which is required to start the freezing process. Once the bottle is shaken or disturbed, air bubbles introduced to the liquid will act as nucleation sites around which the water will begin freezing. Once it begins freezing, the ice will spread until the entire bottle is frozen.

NNY S2k

Matt, I know if I leave bottled water out in my garage it will freeze without being moved. It will also freeze in my freezer.
Levi

Matt_in_VA

Levi,

The question is: Is that mineral water or purified water that was purified by reverse osmosis? The latter would not have any trace minerals in it that may allow ice crystals to form.

Matt_in_VA

I think that this VIDEO is pretty COOL. As it shows what pilot training does. As Gene knows having experienced a wheels up landing first hand.

For what it is worth, I wish that getting a drivers license for a car required the ability to demonstrate one's ability for car control and not like the current trend when one does NOT even have to demonstrate their ability to parallel park. In my world, that helps demonstrate that one knows where each corner of one's vehicle is.

I have to ask the question: How many times do you run across vehicles that are "blocking the box" at an intersection because they do not have a clue where their vehicle is? This includes the several feet both in front and back of their vehicles where if they had a clue they could move into the turning lane and let traffic on both sides go past unimpeded.