Reveal the secret of 'stealth water'

Children up to three can also perform this magic trick.

First of all, please relax with a short video clip about "invisibility water". After that, the article is allowed to "remove" the tricks of this "magic trick" .

The truth is that there is no need to flutter your feet, do not need transparent strings, or any digital effect. Children up to three can also perform the magic once they know the trick used here is "stealth water".

Indeed, "Hidden Water" is a colorless, non-flammable gas called "sulfur hexafluoride" ( SF6 chemical formula). Unlike most of these gases, sulfur hexafluoride, when pumped into a water tank, it will sink to the bottom like water but not color so it cannot be seen with the naked eye. This gas works exactly like the water in a magic show so it is nicknamed "stealth water" . Because of this characteristic, lighter objects easily float on the surface of "invisible water". One thing that is very surprising is that the thrill of "invisibility" is "super simple" deciphered by a few pieces of knowledge in high school textbooks.

First, the cause of "stealth water" is not diffused into the air because the molecular mass of "stealth water" outperforms the average molecular weight of air (146 versus 29). ). Moreover, the "invisible water" molecular density is five times higher than the air density molecule. Imagine two identical sealed boxes, if the first box could contain 5 million "invisible water" molecules, the second box contained only 1 million molecules of air.

About the objects in the magic show floating on "stealth water" based on "Archimedes thrust" . This law can be understood as simple as the following illustration:

- When dipping an object into water, the object will be affected by two opposing forces:

1. Gravity (Gravity)
2. Acsimet (Buoyancy) thrust

The condition for the object to float is when the object is on the surface of the water, two forces are in balance - Gravity is almost constant. Acsimet force depends on the "material density" of the water and the "volume" that the object occupies in the water. When dropping an object from the water surface, the object will slowly sink (Acsimet force gradually increases, due to the increasing volume of water). When the force of Acsimet increased until it was equal to gravity, the object stopped sinking and floated on the water.

Due to banknotes and magic items: either extremely small "material density" (making small gravity), or very wide and with plenty of ambient air (large volume, leading to large Acsimet force ), of course the force of Acsimet is greater than the gravity of the impact on many " floating " objects and floating objects .

If the reader unfortunately forgot or curious, the video below will explain more carefully the force of Acsimet

Besides attracting magic fans and curious eyes. "Invisibility water" also has very practical applications such as used in medical breathing systems, or used as insulating materials in the electrical industry.

Conclude

If you are a passionate about physical phenomena, consider developing your left-hand job as a "magician" to consolidate your finances in this difficult economic time. If you are a normal person, it doesn't matter. At some point, if you feel sick because you have to learn weird issues, try to create an interesting association similar to the "Acsimet" and "invisibility" stories .