Can suck people into the bottomless pit
Sand lived most unique is the mechanism of the universe, he might be buried on the beach side of the river or maybe even in the backyard around, calmly waiting for the people closer, making the difficult forward or backward. In the year 1692, at the port of Jamaica, lived ever happened sand formed from soil solution by the earthquake, later causing 1 / 3 of loss, and the tragedy that killed 2,000 people. Appeared calm lake in the south of England, Fjord or narrow bay in Alaska's beautiful but dangerous and other areas of human events ever happened in the sand trapped alive. However, most people do not often come across the sand of life, let alone witnessed a man stuck in the sand of life or experience it for yourself. Impression of the people against the sand live mainly on a variety of the film. Atmosphere or scene that was created in the film depicts life of sand is a scourge that can suck people into the bottomless pit.
Would dissolve if the surface disturbed Quicksand
a scientist from the University of Amsterdam, the Netherlands Daniel Bonn had met a local shepherd. The pastor pointed to the sand of life in Bonn said, that ever fell into the camel disappeared berbekas.lalu then he did an investigation immediately after kembai related to the country. He took samples of sand to the Netherlands and analyze its composition. Having found that the mixture consists of high-quality sand, clay, and salt water, Bonn and his team create derivative quicksand in large numbers.
He studied and carefully analyzed dozens of films depicting the landscape of sand that swallows people alive, and found that the picture painted of this film completely wrong and wrong. Then, in the laboratory, Bonn mixing sand, clay and salt water, forming a sand model living in a small room for study. After the experiment repeatedly, personnel researchers, led by Bonn found, that it took several days to make a sticky sand. On the other hand is very easy if you want to eliminate viscosity (viscosity), which is quite appropriate given the pressures on its surface. Surface will be "late" quickly if a motion disorders, sand on the surface will become friable (soft), and sand in a shallow layer will also drop down quickly. This displacement movement makes a moving object on the surface of the sand sink to the bottom, then along with the increasing depth of immersion, the sand falling down through the displacement movement of the top layer will gradually be merged, and will create a thick sediment, so that the viscosity or the nature glue accelerates sand, preventing objects fall further.
It took the power up a car
According to research, that people who fall into the sands of life are generally not able to move, increasing the density of sand and glue on the lower limbs are mired in the sand of life, forming a very besas pressure on the body, makes us very difficult to remove power. Is a very big strength is also difficult even in a short time to remove victims trapped in the sand of life. After the relevant researchers calculated that in order to remove a victim trapped leg speed 1 cm / sec just need the power of Newton's 100 thousand, or roughly equivalent to the power lift a medium-size car. Unless assisted by Derek's car, if it is not difficult to remove victims trapped in the sands of life in a short time. Related research results also showed, according to a count of these forces, if forcibly dragged the victim, then before the sands of life "off" the trapped victim, the victim's body was broken attracted by the great powers. The risk that such actions caused far more dangerous than allowing victims to stay alive in the sand for a while.
How to save himself from the trap
Actually most of the sands of life are not much different from the sand in general, not scary as portrayed in the film. In principal, he was just sand that has impregnated the water, because of friction (friction) between the grains of sand is reduced, so that a mixture of sand and semi-liquid water that are difficult to support. The sand is usually found living near the beach.
According to Benn, that there is only one state can submerge the sand of human life (die sinking), which is when the head first into, but probably stuck with a very small way. People who fall into the sand of life just feel 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 legs can loosen the sand around the body and thus can help members to get out of the body in the sand. Related scientists said, actually not so, such movement will only accelerate the clay deposits, strengthening the viscosity (viscosity) of sand live, struggling blindly will only make the victim fall deeper.
Benn said, "how to move away from the sands of life remain, namely the trapped victim to slowly move his legs, so that water and sand as much as seeps into the vacuum, thus can reduce the pressure of the victim's body, while making the sand to slow menggembur slowly. In addition, the victim should also try to separate limbs, because if the sand's surface area touches the larger body, then gained the buoyancy is greater. Provided that the victim had patience enough, with enough movements calm and relaxed, it would gradually freed from the sand traps of life.
In addition research also found that, when an object stuck in the sand of life, its setting speed is determined by the density of the object. Densities of live sand is generally 2 g / milliliter, while the human density is 1g/milliliter. Under this density, the human body is sinking into the sand of life will not drown, often going to stop until the waist.
In addition researchers also found that although the density of objects larger than the sand of life, but still able to float on the sand of life. In a related experiment, they then placed the ball a density of aluminum on the surface 2.7g/mililiter quicksand. And even though its density is greater than the sand of life. However, due to a buoyancy effect and voltage quicksand sand, then the aluminum ball can still quietly located on the surface of the sand of life. The ball did not sink until the researchers shook the quicksand and making movements that cause the mixture more fluid. When doing this, an aluminum ball really completely submerged.
However, when using an aluminum ball with a density similar to humans, which means lower than the density of quicksand, the ball is never lost, although mixtures treated harshly. The fall of an object into quicksand pastikel cause loss of sand mixed with water stability. If you continue to be the pressure, 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 is formed so that the movement made him fall victim deeper," said Daniel Bonn, lead investigator from the University of Amsterdam, as written in the issue of the journal Nature, September 29.
Based on the measurements of these aluminum equipment, increased physical pressure to the particles by 1 percent causes the sinking speed up a million times. Bonn, adding that pulling things from the sand at this stage require the equivalent power of the medium-sized car lift.
Patience and calm
"The most dangerous is when the sand suction tends to pull 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 more densely while more water in the upper layer. Layer of very dense sand under the water contains very little that it's hard to fall off the foot into it, "said Bonn. His advice, remain calm and usually you will float. Straighten your back to extend free area and wait until the feet free from the sand. Bonn is also suggested that the foot moves to control the water so you float. "You have to put water into the sand and the easiest way is twirling 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, similar to the human population densities that can be used as human models.
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