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Topic: Capillary action

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	Reference.com/Encyclopedia/Capillary action
		In hydrology, capillary action describes the attraction of water molecules to soil particles.
		Capillary action is responsible for moving groundwater from wet areas of the soil to dry areas.
		Capillary action is also essential for the drainage of constantly produced tear fluid from the eye, two canalicula of tiny diameter are present in the inner corner of the eyelid, also called the lacrimal ducts; their openings can be seen with the naked eye within the lacrimal sacs when the eyelids are everted.
	www.reference.com /browse/wiki/Capillary_action (643 words)

	Capillary action - Wikipedia, the free encyclopedia
		Capillary action or capillarity (also known as capillary motion) is the ability of a narrow tube to draw a liquid upwards against the force of gravity.
		In hydrology, capillary action describes the attraction of water molecules to soil particles.
		Capillary action is responsible for moving water from wet areas of the soil to dry areas.
	en.wikipedia.org /wiki/Capillary_action (488 words)

	Capillary action - LoveToKnow 1911 (Site not responding. Last check: 2007-10-30)
		This explanation of the action of the solid is equivalent to that by which Gauss afterwards supplied the defect of the theory of Laplace, except that, not being expressed in terms of mathematical symbols, it does not indicate the mathematical relation between the attraction of individual particles and the final result.
		In the Supplement to the Theory of Capillary Action, Laplace deduced the equation of the surface of the fluid from the condition that the resultant force on a particle at the surface must be normal to the surface.
		He has also found that this action is reversible, for when the area of the surface of contact of the acid and mercury is made to increase, an electric current passes from the mercury to the acid, the amount of electricity which passes while the surface increases by one square centimetre being sufficient to decompose.
	www.1911encyclopedia.org /Capillary_action (18374 words)

	Capillary action, from USGS Water Science Basics
		Capillary action is important for moving water (and all of the things that are dissolved in it) around.
		Capillary action occurs because water is sticky, thanks to the forces of cohesion (water molecules like to stay closely together) and adhesion (water molecules are attracted and stick to other substances).
		One common experiment to demonstrate capillary action is to place a stalk of celery in a glass of water that has been colored with food coloring (you might want to use a piece of celery that has begun to whither, as it is in need of a quick drink).
	ga.water.usgs.gov /edu/capillaryaction.html (490 words)

	Capillary - Wikipedia, the free encyclopedia
		Capillaries are the smallest of a body's blood vessels, measuring 5-10 μm.
		Capillaries have walls composed of a single layer of cells, the endothelium.
		In an immune response, the endothelial cells of the capillary will upregulate receptor molecules, thus "catching" immune cells as they pass by the site of infection and aiding extravasation of these cells into the tissue.
	en.wikipedia.org /wiki/Capillary (421 words)

	CAPILLARY ACTION - LoveToKnow Article on CAPILLARY ACTION (Site not responding. Last check: 2007-10-30)
		He considered the capillary phenomena to be of the same kind, but his explanation is not sufficiently explicit with respect to the nature and the limits of the action of the attractive force.
		This explanation of the action of the solid is equivalent to that by which Gauss afterwards supplied the defect of the theory of Laplace, except that, not being expressed in terms of mathematical symbols, it does not indicate the mathematical relation between the attraction of individual particles and the final result.
		It consists of three parts, the first depending on the action of gravity, the second on the mutual action between the particles of the fluid, and the third on the action between the particles of the fluid and the particles of a solid or fluid in contact with it.
	27.1911encyclopedia.org /C/CA/CAPILLARY_ACTION.htm (16914 words)

	[No title] (Site not responding. Last check: 2007-10-30)
		The capillary conduit includes a capillary aperture communicating with the fluid receiving structure so that when a fluid is delivered to that structure in contact with the capillary aperture, it is drawn through the conduit and into the vented test volume by capillary action.
		Proper filling of a capillary fill device requires that an adequate volume of the test fluid be delivered to the fluid receiving portion and be in contact with the capillary aperture of the capillary flow conduit.
		The capillary flow conduit has a predetermined width in plan view and a flow through cross-sectional area that is less than the cross-sectional area of the capillary aperture and less than the maximum flow through the cross-sectional area of the test volume.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/41147.990819&ELEMENT_SET=DECL (3769 words)

	Capillary action (Site not responding. Last check: 2007-10-30)
		Capillary action is a physical effect caused by the interactions of a liquid...
		Capillary action is important for moving water and all of the things that are...
		Capillary action however, is related to the adhesive properties of water.
	www.serebella.com /encyclopedia/article-Capillary_action.html (1674 words)

	Engineering Database
		Liquid rises in a capillary to an equilibrium position determined by the balance of the surface tension force and the gravity force acting on the column of elevated fluid.
		Capillary action is essential in carrying substances and nutrients from one place to another in plants and animals.
		The melted wax is drawn upward in the wick by capillary action, evapourating as it rises because of heat transfer from the flame surrounding the wick.
	www.diracdelta.co.uk /science/source/c/a/capillaryaction/source.html (243 words)

	Capillary Action
		The tubes, with bores 3, 2, 1 and 0.5mm respectively, are held together by tubing clamps and sat vertically in a watch glass containing ink and water (see figure 1).
		Capillary action draws the ink/water up the tubes to varying heights.
		As already mentioned, it can be difficult to see the water levels in the capillaries because of the thin optical depth.
	www.fas.harvard.edu /~scdiroff/lds/NewtonianMechanics/CapillaryAction/CapillaryAction.html (209 words)

	Article Archives (Site not responding. Last check: 2007-10-30)
		It is capillary action that causes water to move up through the carpet to the surface and dry after it has been wet cleaned.
		Two types of forces bring about capillary action: One is the attraction between like molecules (as in water molecules); called cohesion, this force tends to reduce the surface area.
		Capillary action should not be confused with hygroscopic nature of a fiber.
	www.cleanfax.com /article.asp?IndexID=150105 (1101 words)

	Capillary action (Site not responding. Last check: 2007-10-30)
		Capillary action or capillarity is the ability of a narrow to draw a liquid upwards against the of gravity.
		A common apparatus used to demonstrate capillary is the capillary tube.
		A plant makes use of capillary action to liquid water into its system although larger plants transpiration to move a sufficient quantity of to where it is required.
	www.freeglossary.com /Capillary_action (620 words)

	Experimental Design
		Capillary action is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.
		The experiment is a three variable design to test the best environment for capillary action to take place and whether or not the height of the plant is a factor.
		Based on this data, the most important factor in capillary action is the presence/absence of light, followed by length of stem, followed by the presence/absence of heat.
	www.umd.umich.edu /sep/students/jadeegan/jadeegan_exp.html (1484 words)

	Capillary action (Site not responding. Last check: 2007-10-30)
		Capillary action is important for moving water (and all of the things that are dissolved in it) around.
		It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.
		Capillary action occurs because water is sticky -- water molecules stick to each other and to other substances, such as glass, cloth, organic tissues, and soil.
	arcweb.medialighieri.it /english/capillarita.htm (271 words)

	Capillary Action
		The height water will rise in a small cylinder, or capillary tube, is dependent on the diameter of the tube, and is affected by the density of the water and the gas (which are functions of temperature), the acceleration of gravity, the contact angle (water with the glass), and the surface tension of the liquid.
		The height of rise in the capillary tubes above the water level in the dish ranges from 1 mm in the straw on the left to 42 mm in the small capillary on the right.
		The height of rise in the straws is less than would be expected in a glass capillary because of lower adhesion between water and plastic.
	www.wtamu.edu /~crobinson/SoilWater/capillar.html (727 words)

	Surface Tension
		Capillary action is the result of adhesion and surface tension.
		Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.
		The height to which capillary action will take water in a uniform circular tube is limited by surface tension.
	hyperphysics.phy-astr.gsu.edu /hbase/surten2.html (579 words)

	PIRA 2A20.00 Capillary Action (Site not responding. Last check: 2007-10-30)
		Two sets of capillary tubes, one filled with water and one filled with mercury.
		Sets of capillary tubes with water and mercury are compared.
		Sets of capillary tubes of various diameters show capillary rise with water and capillary depression with mercury.
	www.physics.ncsu.edu /pira/2fluid/2A20.html (223 words)

	CAPILLARY ACTION - Online Information article about CAPILLARY ACTION
		Vinci must be considered as the discoverer of capillary phenomena, but the first accurate observations of the capillary action of tubes and glass plates were made by See also:
		Instead of calculating the direction and magnitude of the resultant force on each particle arising from the action of neighbouring particles, he formed a single expression which is the aggregate of all the potentials arising from the mutual action between pairs of particles.
		The only difference is in the manner in which this quantity H depends on the law of the molecular forces and the law of density near the surface of the fluid, and as these laws are unknown to us we cannot obtain any test to discriminate between the two theories.
	encyclopedia.jrank.org /CAL_CAR/CAPILLARY_ACTION.html (3950 words)

	Capillary action (Site not responding. Last check: 2007-10-30)
		Capillary action or capillarity is the ability of a narrow tube to draw a liquid upwardsagainst the force of gravity.
		When the lower end of a vertical glass tube is placed in a liquid such as water, aconcave meniscus forms.
		With some pairs of materials, such as mercury and glass,the interatomic forces within the liquid exceed those between the solid and the liquid, so a convex meniscus forms and capillaryaction works in reverse.
	www.therfcc.org /capillary-action-82789.html (309 words)

	Gardening: Reference: How Water Moves in Soil
		Water moves through the soil because of the forces of gravity (pulling downward) and capillary action (the force with which water molecules cling to each other and to soil particles).
		Capillary action is caused by the surface tension of the water, the force that makes water climb the side of a glass slightly.
		Eventually, when the film of water on the soil particles is thin enough, the force of gravity pulling downward is balanced by the capillary action of the water molecules clinging to soil particles, and the water stops draining downward.
	www.gardenadvice.com /index.cfm/event/showDocument/documentId/bd7020081f4cbceed92fa6b3341b4123 (638 words)

	Capillary Action - News (Site not responding. Last check: 2007-10-30)
		For all intents and purposes, Capillary Action is Philadelphia native and Oberlin College junior Jonathan Pfeffer often accompanied by keyboardist Sam Krulewitch, drummer Ricardo Lagomasino, and bassist Spencer Russell.
		With a full band in tow, Capillary Action's frenetic live show, which has often resulted in a variety of injuries, will be hitting a city near you in the coming months.
		Capillary Action in essence is a spectrum, a thermometer.
	www.capillaryaction.net /about.shtml (921 words)

	Lesson 2 : How water gets into the home
		Capillary action is the wicking of water into a porous material via adhesion (clinging to the concrete) and surface tension (clinging to itself).
		You might not consider capillary action to be a significant factor in causing water intrusion, but it can be very powerful.
		A simple way to think about how powerful capillary action can be is to consider a tree, which uses capillary action to move water up through its narrow roots to its leaves.
	www.buildiq.com /Demos/Fundamentals/html/FundDemo.html (768 words)

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