Some of the earliest astronomers proposed that we live in a geocentric universe, which means that Earth is at the center of everything. They said the sun rotated around us, which caused sunrises and sunsets — same for the movements of the moon and the planets. But there were certain things that didn't work with this vision. Sometimes, a planet would back up in the sky before resuming its forward motion. We know now that this motion — which is called retrograde motion — happens when Earth is "catching up" with another planet in its orbit. For example, mars orbits farther from the sun than Earth. At one point in the respective orbits of Earth and Mars, we catch up to the red Planet and pass.
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With the quick change system, the loader can transform from the loader to the forklift unit, broom unit, little grader unit, little crane unit by changing to the special equipment parts,. Forklift set, brush essay set, etc. With the set of steel impact wheels, the unit can impact the ground and loading the dirt at the same time. 500 hours work experience required before getting the special license to operate the unit. All the earth equipment aim to take over hard work from the human beings. They make it so easy for the development field, structure site. With the special equipment, they take care of special jobs such as digging, shipping, tilting soil or dirt or rock, etc. They are the true friendly paper machines to build the happy live now and in the future. As an Earthling, it's easy to believe that we're standing still. After all, we don't feel any movement in our surroundings. But when you look at the sky, you can see evidence that we are moving.
It can handle the shredder job anywhere, loading dirt, unload it to the truck to make the job easier. With the tough body contains a great power, it is ready to take over tough heavy work on the field. When a load of the dirt needed to be removed or relocated, the loader to be called with the dump truck so both machines operate together to do the job. It can work with the other machine as well, or operating by itself. As it is so useful, you can see it every where from the small job to the big building job: from the side of the river to the side of the mountains; in city or out in the country, from the back yard of the. Similar to the bulldozer, most of the loader units run by one powerful engine with two systems: one is mechanic system, the other is hydraulic system. Mechanic system used to drive the unit, hydraulic system transfers the power to the arms, or to the basket, or to the ripper in order to load the dirt and ship it away.
As the machine performs the special action with the great power, it needs the specialist license to control. 500 hours practice time required having this license. Loader 928 dates f, loading the earth material or abroad it to the truck or to the side of the field is the task of this special unit. The loader with a basket attached in front and a ripping set at the back, we may confuse with the bulldozer. The difference task between two machines is the bulldozer used to cut down and put the dirt away; while the loader aims to shovel the dirt and load it to the truck that is parked beside. Since it replaces the shovel of the human, it does a lot of work for the man. It can remove a huge lump of soil out of the field. It can cut down the time and save the money.
This task can save a lot of time compare to the man force. It can operate by a single man so the labour cost could be cut down to the minimum. This machine works side by side with the other machines. Its called in the first state of the task to develop the base of the side. First it cleans the side, knocks down the trees, pushing them to one side then using its huge blade to clear all the rubbish. After that, it levels the surface, making it easy for the next task. Sometimes the ground is too hard, it uses the ripper at the back to plough deep down into the soil, breaks it and pushes it away later. Inside the heart of this unit, there is a powerful engine up to 450 hp to drive two systems: Mechanic system used to run the unit toward, reverse turning, etc. Hydraulic system used to perform lift arms up, low arms down, ripping, digging by using the blade in front and the ripping unit at the back.
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It is used to clear, level, clean the surface of the earth. It does all the work to develop the side to be ready for buildings, fields, schools, landscapes etc. With the caterpillar tracks, it homework is powerful to tackle any hard work. This is one of the most power machines today. Engine by caterpillar diesel engine 3406.
Gross power 427 hp, product power 405 hp, rate pushing 40 ton. Body capacity.9m2, aim to replace the manpower to handle the incredible work, pushing leveling the side of the earth surface. Main task of the machine is pushing down the earth surface to the level required. With the powerful machine, both sidetracks using rip to the ground, it can also rip the ground, digging to make the soil loosen by dropping down the ripping system located in the back of the unit. This machine was built in the need of the civil engineering task. It can work to build the foundation of the building, minefield etc. It can remove up to 40 tons of dirt in one single push.
It can break the rock to the small pieces to level the surface in a limit time. The machine can handle a job equal to 200-man power in daily work. This machine was built to counteract the need of huge digging job around the field. It operates with the other earth moving machines such as dump truck, loader, etc. We can see this machines every where: around the field, in the habour, in city, on the side of the road.
Perhaps it is busy digging sand, breaking down rock, digging the drain lines, and lifting a piece of concrete. Really, it is a great machine. The machine is run by tracks. The speed is up.5 km/hr. The huge arm attaches to the body of the unit. With the hydraulic system, the arm can stretch out, fold in, lift high in the sky, and dig deep into the surface of the earth. With the special basket located on the tip of the arm, it can dig deep into the ground, pick up soil then swing around to unload to the truck located beside. As this machine is the special unit, it requires the operator with at least 500 hours working experienced before he can hold a special license to operate. Bull dozer D11R, this is a powerful tractor with a broad vertical blade attached in front.
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It will give us our first evidence of the handiwork of extraterrestrial beings.'. Earth surface to build the level car park. The special task of this machine is digging. In the early age when the human tools are summary just the picks, shovels. With the basic tools, men must work very hard to tackle the job. Now the machines are in place after time to time to refine, the excavator 322B appears to help. This unit is used to replace the manpower by machine, with the circle rate very fast; it can do the job better on the field. It can dig or pick up a huge amount of dirt and ship it aside.
These criticisms are accepted by the scientists. 'our investigation has shown just how delicately earth is poised within the solar system laughlin admitted. 'nevertheless, our work has practical implications. Our calculations show that to get Earth to a safer, distant orbit, it would have to pass through unstable zones and would need careful nurturing and nudging. Any alien astronomers observing our solar system would know that something odd had occurred, and would realise an intelligent lifeform was responsible. 'And the same goes for. When we look at other solar systems, and detect planets around other suns - assignment which we are now beginning to do - we may see that planet-moving has occurred.
could fire it straight at Earth - with devastating consequences. It is a point acknowledged by the group. 'The collision of a 100-kilometre diameter object with the earth at cosmic velocity would sterilise the biosphere most effectively, at least to the level of bacteria they state in a paper in Astrophysics and Space Science. 'The danger cannot be overemphasised.'. There is also the vexed question of the moon. As the current issue of Scientific American points out, if Earth was pushed out of its current position it is 'most likely the moon would be stripped away from Earth it states, radically upsetting out planet's climate.
The plan put forward by Dr laughlin, and his colleagues Don Korycansky and Fred Adams, involves carefully directing a comet or asteroid so that it sweeps close past our planet and transfers some of its gravitational energy to earth. 'earth's orbital speed would increase as a result and we would move to a higher orbit away from the sun laughlin said. Engineers would then direct their comet so that it passed close to jupiter or Saturn, where the reverse process would occur. It would pick up energy from one of these giant planets. Later its orbit would bring it back to earth, and the process would be paper repeated. In the short term, the plan provides an ideal solution to global warming, although the team was actually concerned with a more drastic danger. The sun is destined to heat up in about a billion years and so 'seriously compromise' our biosphere - by frying. Hence the group's decision to try to save earth. 'All you have to do is strap a chemical rocket to an asteroid or comet and fire it at just the right time added laughlin.
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Scientists have found an unusual way to prevent our planet overheating: move it to a cooler spot. All you have to do is hurtle a few comets at Earth, and its orbit will be altered. Our world will then be sent spinning into a safer, colder part of the solar system. This startling idea of improving our interplanetary neighbourhood is the brainchild of a group of Nasa engineers and American astronomers who say their plan could add another six billion years to the useful lifetime of our planet - effectively doubling its working life. 'The technology is not at all far-fetched said business Dr Greg laughlin, of the nasa Ames Research Center in California. 'It involves the same techniques that people now suggest could be used to deflect asteroids or comets heading towards Earth. We don't need raw power to move earth, we just require delicacy of planning and manoeuvring.'.