Sand live is the most unique mechanism of the universe, he probably buried on the beach by the river or maybe even in the backyard around, calmly waiting for the people closer, make people hard forward or backward.
In 1692, at the port of Jamaica, ever live sand formed from soil solution by the quake, have recently led to third lost city, and the tragedy that killed 2,000 people.
The lake is calm in the south of England, Fjord or narrow bay in the beautiful but dangerous Alaska and other areas of human events ever trapped into living sand.
However, most people often have never come across the sand of life, let alone witnessed a person stuck in the sand of life or experience it for yourself. Impression on the sand people live mainly on the basis of watching a movie. Atmosphere or the scenery that was created in the film depicts life of sand is a scourge that can suck the human into the bottomless pit.
Would dissolve if the surface disturbed quicksand
A scientist from the University of Amsterdam, the Netherlands namely Daniel Bonn had met with a local shepherd. The pastor pointed quicksand, saying in Bonn, there was a camel that had fallen into the later disappeared without trace.
Then he immediately conduct an investigation related to the kembai to his country. He took samples of sand to the Netherlands and to analyze its composition. After finding that the mixture consists of high-quality sand, clay, and salt water, Bonn and his team create artificial quicksand in large numbers.
He observed and carefully analyzed dozens of film that depicts the view of human quicksand that swallowed it, and found that the imagery of these movies completely wrong and incorrect.
Then, in the laboratory, Bonn mixing sand, clay and salt water, forming a sand model of living in a small room to be investigated. After repeated experiments, researchers led Bonn personnel found that it took several days to make the sand becomes sticky.
Contrast is very easy if you want to eliminate the viscosity (viscosity), which is quite fitting given the pressure on its surface. Surface will be "late" quickly if a disorder of movement, the sand on the surface will become friable (soft), and sand in the shallow layer will also be dropped down rapidly.
This displacement movement to make objects move on the surface of the sand sink to the bottom, then along with the increasing depth of immersion, the sand falling down through the movement of the displacement of the top layer will slowly merge, and will create a thick sludge, so that the viscosity or the nature glue accelerates sand, preventing objects fall further.
It takes strength to lift a car
According to the research, that people are stuck in quicksand usually can not move, which increases the density of sand then glue on the lower limbs that fell into quicksand, forming a very besas pressure on the body, making us a very difficult issue of energy.
A very big strength is also difficult even in a short time could remove victims trapped in the quicksand. After the calculation of related researchers, that in order to remove a trapped victim of a foot with a speed of 1 cm / sec just need the strength of one hundred thousand Newton, or approximately equivalent to the power to lift a medium-size car.
Unless assisted by Derek's car, if it is not difficult to remove victims trapped in quicksand in a short time. Related research results also indicate that, according to a count of this power, if forcibly dragged the victim, before the quicksand "release" a trapped victim, the victim's body had broken attracted by the huge power.
Risks resulting from such actions is far more dangerous than letting the victims remain in the quicksand for a while.
How to save themselves from the trap
Actually most of the quicksand is not much different from the sand in general, not scary as depicted in the film. In principal, he was just sand that has been impregnated water, because of friction (friction) between sand grains is reduced, so that a mixture of sand and water and half liquid which is difficult to support. Live sand is usually found around the coast.
According to Benn, that there is only one state can sink into quicksand man (die sink), ie when the head first went in, but chances are mired in this way is very small. People who fall into quicksand just felt a little pressure on the chest, a little hard to breathe, would not life threatening. Tidal sand live near an enemy then a scary for victims who are trapped.
People mistakenly interpret that to shake the legs can loosen the sand around the body, thereby helping members to exit the body in the sand. Related scientists said, was not really so, so will only accelerate the movement of clay deposits, strengthening the viscosity (viscosity) quicksand, struggling blindly will only make the victims mired deeper.
Benn said, "how to move away from quicksand remain, namely a trapped victim should move her legs slowly, so water seeps into the sand as closely as empty areas, so will be able to reduce the pressure of the victim's body, while making sand so slowly menggembur slowly.
In addition, the victim must also try to separate limbs, because if the surface areas of the body touched sand that was higher, the buoyancy obtained will be greater. Provided the victim has enough patience, with the movement which was quite calm and relaxed, it would gradually free from the quicksand trap.
In addition the research also found that, when an object is stuck in quicksand, its setting speed is determined by the density of the object. Densities of live sand is generally 2 g / milliliter, while the density of humans is 1g/milliliter. Below this density, the human body is sunk into the sands of life shall not die sinking, often going to stop until the waist.
In addition the researchers also found that although a number of objects larger than sand-density living, but still able to float on the sand of life. In a related experiment, they then placed the ball of aluminum on the surface density 2.7g/mililiter quicksand.
And even though its density is larger than life sand. However, due to a buoyancy effect and voltage quicksand sand, aluminum ball can remain calmly on the surface of live sand. The ball did not sink until the researchers thrilling quicksand and making movements that cause the mixture more fluid. When doing this, the aluminum ball was entirely submerged.
However, when using aluminum ball with a density similar to humans, which means lower density than the quicksand, the ball is never lost, although mixtures treated harshly.
The fall of the object to cause pastikel quicksand sand mixed with water to lose stability. If you continue to be stressed, the mixture will turn into more liquid on the surface and very solid at the bottom.
"The greater the pressure, the more liquid the quicksand that is formed so that movement of the victim made her increasingly mired in," said Daniel Bonn, lead investigator from the University of Amsterdam, as written in the journal Nature.
Based on the measurement of aluminum equipment, improving the physical pressure to the particles of one percent caused the sinking speed up a million times. Bonn, adding that pulling things off the sand at this stage requires a force equivalent to lifting medium-sized car.
Patience and calm
"The most dangerous is when the sand suction tends to draw quickly," he said. But patience can save you. If you wait patiently, gradually the sand particles will be stable so that the mixture buoyancy will lift you up.
We know that the sand layer beneath it more securely while more water in the upper layer. Very thick layer of sand beneath the water contains very little making it hard off the foot of the fall into it, "continued Bonn.
Her advice, stay calm and you'll usually float. Straighten your back to expand the area which is free and wait until the legs are free of sand. Bonn is also suggested that the foot moves to control water so you float. "You must enter the water into the sand and the easiest way is twirling around the foot in quicksand," he added.
Suggestions are most likely correct. The proof, aluminum ball second in this experiment did not sink more than half a part. Although the ball is only four millimeters in diameter, similar to the human density that could be used as a human model.
