A long time ago, engineers will use this type of machine. Today, as long as in the parking lot or the gas station, you can see the hydraulic crane, use it resorted to a child's strength will be able to lift a car up. Let's see how the device works, and try to make an instrument for the experiment.
Please look at the pictures, with a hand of two root canal filled with liquid (water or oil) connected to the container. One of the containers is very large, and the section of the other vessel is small, assuming that it is 1000 times smaller than the previous one. If you use a piston (a) pressing down on the small section of the liquid level in the tank, liquid is a pressure, stress and the intensity will be in accordance with the size of the original transfer to any other part of the liquid surface, including, of course, in a large section of the container and the piston (b) contact with the liquid surface. Pressure is equal to the force divided by the area of action.
According to the Pascal principle, the pressure of piston B and the pressure of the piston under A are equal, and the area under the piston B is 1000 times larger than that of the piston under A, the acting force on it should be 1000 times larger than that on the A. Therefore, in order to lift a 1 ton car, as long as 1 kg of force is enough. Hydraulic brake, compressor, car jack, pump and many other instruments have benefited from this principle.
Finally, if you want to verify efficiency of as a pressure device, the device can be placed between the scale plate and the big piston on a walnut: you will see squeeze a small syringe piston can easily be crushed walnut.
With this small machine will be able to complete the "Haig Lis" (Jose's son, the power of infinity, had completed 12 heroic achievements) so great. Prepare a full liquid filled barrel (do not have air, because the air will be compressed under pressure), you can begin to show your friends. Will be filled with a liquid filled with a liquid filled with a small syringe and a small tube connected, you will see the latter two can be shattered in the barrel. We try to calculate brushstroke Zhang: a section for 0.5 cm2 ordinary syringe, with the thumb applied pressure on the piston is 20 kilograms (with scale validation, achieves this weight is not difficult), the pressure was actually 40 ATM. Few barrels can withstand such pressure. A farmer was sorry to find this phenomenon. He wanted to pass a long thin tube of precious wine from his country cottage to a friend at the foot of the mountain at the foot of 30 meters. Everything was going well: Friends of the casks filled with wine, but then the pressure in the liquid pipe soon the bucket crusher, wine soaked up the house.
See the magic of the phenomenon, how now Jack how the work of all know it. The principle is very simple is the first found that the person is not easy, in fact, a small life details. Will be a great invention, with a jack, but is another kind of squeezing toothpaste process.