Can you turn a full glass of water upside down and not spill it? You need to try
a glass, water and a sheet of paper.
Fill the glass to the brim with water and place it on the surface of the paper.
Beware of attaching paper is the most important step in the attempt. Then turn
the glass upside down. What will happen?
Water will not flow out, keeps in a glass with paper, because at "the
bottom" effect atmospheric pressure. Anyway, so you can "keep" 10 m high water column, because the pressure 10 meters of water is roughly
equivalent to atmospheric pressure.
Take a plastic straw
and rub on your shirt or in your hair. On the table lay empty an empty can of juice. Lay
it on its side and make sure it's still. Hold the straw parallel to the axis of the tins.
Make sure the straw does not touch the can -the straw should be about one centemetre away from the can. As you move the straw, the can should follow it like an obedient dog.
Why is this so?
Physics tells us that when you rub the straw it becomes electrically charged. When we move the straw towards the metal can, the electrons in the metal rush to the surface of the can and are attracted to the opposite charge of the straw by electrostatic attraction i.e. positive (+) and negative (-) charges are attracted to each other.
An example is locatedapproximatelyin the 30thsecond ofvideo.
Can is the thing that we encounter on a daily basis. Can this drink offer anything else? It can serve as a box for pens or it may also entertain us and our friends.
Take the empty can and try to put it on the sloping part of the bottom. What will happen? Can falls. Why? Is it possibleto standon the side?
Try it. Take can, fill it approximately half with water and try to put it back on the sloping part of the bottom. Amazing, tin stand on the side. How is it possible? The fact that can is filled with water, there is a shift of the center of gravity and therefore can happen. Physics is beautiful, is'nt it? :-)
Let's start this blog by going through a fun experience :
Do you know that if you insert a Mentos to Cola, bottle will explode? Just try it, it's amazing. Really!
Go out with your friends, find a free space and enjoy !
"If you drop a pack of Mentos into a bottle of Diet Coke, you get this
huge fountain of spray and Diet Coke foam coming out," says Tonya Coffey,
a physicist at Appalachian State University in Boone, North Carolina.
"This was a good project for my students to study because there was
still some mystery to it."
What is the explication of this phenomenon?
As stated actors from MythBusters, so the potassium benzoate, aspartame, and CO2 gas contained in the Diet Coke, in combination with the gelatin and gum arabic ingredients of the Mentos, all contribute to formation of the foam.
The structure of the Mentos is the most significant cause of the eruption due to nucleation. When we have a fruit-flavored Mentos with a smooth waxy coating were tested in carbonated drink there was hardly a reaction, whereas mint-flavored Mentos (with no such coating) added to carbonated drink formed an energetic eruption, affirming the nucleation-site theory.
According to MythBusters, the surface of the mint Mentos is covered with many small holes that increase the surface area available for reaction (and thus the quantity of reagents exposed to each other at any given time), thereby allowing CO2 bubbles to form with a rapidity and in a quantity that are responsible for the "jet"- or "geyser"-like nature of the effusion.
So much for thetheory of howit works.Thelength of thethrowevenheldcompetitionsand weevenrecordeda world recordof2,865simultaneousgeysers.At theend of the articlestillsee howit looks inpractice.
Can you turn a full glass of water upside down and not spill it? You need to try
a glass, water and a sheet of paper.
