In 1692, at the port of Jamaica, ever live sand formed from soil solution by the quake, the latter causing one third of lost cities, and the tragedy that killed 2,000 people.The lake was calm in the south of England, a narrow bay or fjord in Alaska is beautiful but dangerous and other areas of human events ever caught alive in the sand.
However, most people often do not ever come on the sands of life, let alone watching people get stuck in the sand of life or experience it for yourself. Impression of the people living mainly in the sand based on various film looks. Creating an atmosphere or scene in the film describes the life of the sand is the scourge that can suck people into the abyss.Would dissolve if the surface is disturbed quicksandA scientists from the University of Amsterdam, The Netherlands Daniel Bonn ever meet a local shepherd. Pastor pointed quicksand, said in Bonn, that there was once mired in a camel and then disappeared.Then immediately after he conducted an investigation related to his country kembai.He Dutch sand to take samples and analyze its composition. Having found that the mixture consists of high-quality sand, clay, and brine, Bonn and his team create artificial quicksand in large numbers.He observed and carefully analyzed dozens of movies that depict views of the sand man who swallowed it, and found that the picture painted in these films are completely wrong and wrong.
Then, in the laboratory, Bonn mixing sand, clay and salt water, forming a sand model of living in a small room for examination. 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 will eliminate the thickness (viscosity), which is quite fitting given the pressure on its surface. The surface will be "dissolved" on the fly if it gets movement disorders, the sand on the surface will become friable (soft), and sand in a shallow layer will also come down quickly.The movement of this shift makes objects move on the surface of the sand sink to the bottom, then along with the increasing depth of sinking, sand falling down through the displacement movement of the upper layer will slowly converge, and then will make a thick sediment, so that the viscosity or the nature glue sand accelerate, preventing objects falling further.It takes strength to lift carAccording research, that people are mired in quicksand generally can not move, which increases the density of the sand then glue on the lower limbs are mired in quicksand, forming a very besas pressure on the body, making us very hard labor.People who are very large force is also difficult in a short time to remove victims trapped in the quicksand. After calculation of the researchers involved, that to remove a trapped victim's feet with a speed of 1 cm / sec just need to force Newton 100 thousand, or approximately equivalent to the power of raising a medium-size car.
Unless assisted by Derek car, if it is not difficult to remove victims trapped in quicksand in a short time. The results of related research also shows, according to a count of this power, if forcibly dragged the victim, the quicksand before "releasing" a trapped victim, the victim's body broken attracted by the big powers.Risks resulting from these actions is far more dangerous than allowing victims to remain in the quicksand for a while.How to escape from quicksand trapActually most of it is not much different from the sand in general, not creepy as depicted in the film. In principle, only the sand that has been impregnated water, due to friction (friction) between the grains of sand is reduced, so that it becomes a mixture of sand and semi-liquid water that are difficult to support. Sands of life are usually found around the coast.According to Benn, that there is only one state of human quicksand can sink (sink), that is when the head first to get into, but chances are mired in this way is very small. People who are mired in quicksand just feel a little pressure on the chest, a little hard to breathe, would not life-threatening. Tide near the sands of life, then the enemy scary for trapped victims.People mistakenly interpret that by shaking the legs can loosen the sand around the body, thus helping the limbs to get out of the sand. Related scientists say, the reality is not so, this will only accelerate the movement of clay sediment, reinforcing the viscosity (viscosity) of sand, struggling blindly will only make the victim more deeply mired.
Benn said, "a way to escape from the sand remains, namely the trapped victims should move the legs slowly, so water and sand as much as seep into hollow areas, it will be able to reduce the pressure loss of the victim, and makes the sand so slowly menggembur .In addition, victims should also try to separate limbs, as if that touch the sand surface area greater weight, then the buoyancy gained will more greater.Provided that the victim has enough patience, with the motion quite calm and relaxed, then slowly would be free from the trap of quicksand.In addition the study also found that, when an object is stuck in quicksand, setting the pace determined by the density of the object. The density of live sand is generally 2 g / milliliter, whereas the human density is 1g/milliliter. Below this density, the human body sinking into the sand of life will not drown, will often stop to the waist.In addition the researchers also found that although the density of objects larger than life sand, but still able to float on the sand of life. In a related experiment, they then put a ball of aluminum on the surface of the sand density 2.7g/mililiter.And although its density is larger than life sand. But it had the effect of buoyancy and voltage quicksand sand, then the aluminum ball can remain calmly on the surface of live sand. The ball did not sink until the researchers shook the sand suction and made a motion that causes the mixture more fluid. When doing this, an aluminum ball is really entirely submerged.However, when using a ball of aluminum which has a density similar to human beings, which means lower than the density of quicksand, the ball did not sink, even though the mixture is treated harshly.The fall of the object into quicksand pastikel mixed with water, causing the loss of stability. If it continues to be pressure, the mixture will turn into more liquid on the surface and very solid on the bottom."The greater the pressure, the more fluid that forms in quicksand so that movement of the victim makes it sinks deeper and deeper," said Daniel Bonn, lead investigator from the University of Amsterdam, as written in the journal Nature.Based on measurements of aluminum equipment, physical pressure to increase by 1 percent causes the sinking velocity of particles one million times. Bonn adds that pulling items out of the sand at this stage requires equal power lifting medium-sized car.Patience and calm "The most dangerous is when the quicksand tend to draw quickly," he said. But patience can save you. If you wait patiently, slow sand particles will be stable so that the buoyancy of the mix will lift you up.We know that underneath a layer of sand over the meeting while more water in the upper layer. A very thick layer of sand below contain very little water so it is difficult to remove the foot that falls into it, "said Bonn.His advice, stay calm and usually you will float. Straighten your back to expand the area that is free and wait until the feet are free from sand . Bonn also suggests moving your feet to control the water so you float. "You have to put water into the sand and the easiest way is twirled around the foot in the quicksand," he added.Suggestions are most likely correct. The proof, aluminum ball second in this experiment did not sink more than half. Although the ball is only four millimeters in diameter, density is the same with humans so they can be used as a human model.
Sources: Kaskus.us
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