Perosity is formation of bubbles inside a material. It happens in many industrial proceses, in many cases rendering the material useless.
The point of using a hydraulic is quite simple, people use it to measure and estimate velocity of water passing between at least 2 points. The way to calculate the velocity and therefore have a reason to have a hydraulic table is using hydraulic conductivity, perosity and hydraulic gradient. A different kind of hydraulic table is one that is used to move heavy machinery around shop floors or in workshop style buildings, commonly used because of the strength and the manoeuvrability to move these heavy objects without the use of a bigger machine to move it.
1.Hardness-the ability to oppose change in shape;also defined as=-the ability to snatch another substance==2. Brittleness-the ability crumble when subjected to a blow==3.Luster-the ability of a substance to shine==4.Malleability-is the ability of a material to hammered into thin sheets==5.Ductlicity-is the ability of a material to be drawn into fine wires==6.Elasticity-the ability of an object to be streched out can be formed again to its original form==7.Perosity-the ability to absorb liquid==8.Flexibility-the ability to bent without breaking==9.Solubility-the ability of matter to be dissolved in another material=