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What else can I help you with?
What feature of a membrane describes whether molecules can cross the membrane?
permeabiity
Unit of relative permeability?
Relative permeability does not have a unit as it is a dimensionless quantity that describes how easily a fluid can flow through a porous medium (such as a rock or soil) relative to the fluid's flow in a vacuum. It is typically represented as a dimensionless ratio ranging from 0 to 1.
What can differential permeability also be described as?
Differential permeability can be described as phenomenon where a differential permeable membrane through different diffusion processes allows smaller molecules/ions as glucose, sodium and chlorine to diffuse out while macromolecules as starch to remain behind until an equilibrium is reached, where concentration of smaller molecules/ions equals on both sides of the differential membrane.Differential permeability can also be described as Dialysis.
Permeability refers to?
Permeability is a word used to describe a property of a certain material. It describes whether it will allow another substance such as water to pass through it. To use it in example, one could say 'This cloth is all wet, so it must be permeable'
Does an increase in cholesterol affect membrane permeability?
Yes, an increase in cholesterol can affect membrane permeability by making the cell membrane less fluid and more rigid, which can impact the movement of molecules in and out of the cell.
What soil has the highest permeability clay sand or silt?
Sand has the highest permeability among clay, sand, and silt. Sand particles are larger with more space between them, allowing water and nutrients to flow more easily through the soil. Clay has the lowest permeability due to its fine particle size and compaction, which can restrict water movement.
Why do sand have high permeability?
Sand has high permeability because its grains are relatively large and have significant spaces between them. This allows water or other fluids to flow easily through the sand, making it a good material for filtering and draining water.
What is permeability in sand casting?
This allows the gases and steam to escape from the mold during casting. The grain size, shape and distribution of the foundry sand, the type and quantity of bonding materials, the density to which the sand is rammed, and the percentage of moisture used for tempering the sand are important factors in regulating the degree of permeability.
What is soils ability to transmit water?
I think the word you're looking for is "permeability."
Which is more permeable fine sand course sand or soil?
Fine sand is more permeable.
What is best for cement mortar fine sand or coarse sand?
Fine sand is best for mortar.
What are the 6 sizes of sediments largest to smallest?
coarse sand, medium sand, fine sand, very fine sand, silt, & clay
Why permeability is important in molding sand?
The Mold Must Be Permeable, Porous To Permit The Gases To Escape
How does the permeability of a sand filter change with time as it filters more and more water?
Permeability is dependent on a number of factors and a number of mechanisms can act to alter the permeability of a sand when water is passed through it:Fluid chemistry:Depending on the composition of the sand grains and also the water chemistry, reactions can occur that will precipitate minerals that act to reduce the permeability of the sand. Conversely, acidic waters may act to dissolve mineral grains and may lead to increased porosity and ultimately an increase in permeability. NB: This is a very simple summary of a very complex topic.Presence of dissolved gasses in the fluid:Gasses may come out of solution from the water as it passes through the sand filter. These can form bubbles which become trapped and will act as barriers to flow reducing permeability (it is for this reason that in laboratory testing of soil permeability, de-aired water must be used).Flow velocity:Depending on the fluid flow velocity and the direction of flow through the sand, the soil sample may "boil". This is where the pore pressure is increased due to the high flow rate to the point that the sand essentially liquefies (known as liquefaction). As such this is no longer an interaction between a fluid and a porous and permeable medium, rather it is an interaction between two fluids (the water / sand suspension and the input water).Transient effects:Fluid temperature will effect viscosity and as such this will have an impact of the permeability of the sand (this is why a temperature correction is applied to laboratory permeability tests on soils).Repeated saturation then draining of the sand, will vary the pore water pressure thus varying the effective stress within the soil. During any phase where the water is free draining from the filter sand, the pore pressure will become negative. This is known as soil suction and can lead to increasing density of the sand, which reduces pore space and ultimately therefore reduces permeability.
What is the fine sand deposited by action of wind?
Dunes are deposits of fine sand which were transported by wind.
What is the permeability of No. 8 gravel No. 67 limstone No. 8 limestone No. 57 stone and limestone sand?
The gravels will be very fast. The permability of the sand will depend on how clean it is. As more material passes the No. 200 sieve, permeability will rapidly decrease. At 10 to 15 percent, ponding will easily occur.
What causes water to go back into the earth?
gravity and soil permeability (spaces in between sand particles)
