What causes surface tension in water?
82769
Specifically the intermolucular forces make up surface tension in water are hydrogen bonds.  A hydrogen bond is a noncovalent interaction between two polar molecules.  In this case one molecule of water lines up with another as shown here:  H2O - HOH.  Where the "-" is indicating an interaction between the relatively postive hydrogen on the right molecule and the negative lone pair of electrons on the oxygen of the left molecule.  As each molecule has two hydrogen atoms and two lone pairs of electrons on the oxygen, each is capable of participating in four separate hydrogen bonds.
630018
When you softly place a pin onto the surface of water (horizontally) it doesn't sink because the weight of the pin is balanced by the upward (vertical) component of surface tension. When you add a detergent powder it reduces the viscosity of water and hence the upward force due to vertical component of surface tenbsion decreases and hence it sinks.
68685
water with salt bcoz water bcoms lighter wen alt dissolves in it ans hence its density decreases allowing it to evaporate easily
161590
Most over the counter rubbing alcohol is 70% isopropanol alcohol 30% distilled water.\n\nSurface tension can be measured with scientific devices called Tensiometer.\n\nPure water has a surface tension of 72 dynes/cm. If a solution containing an alcohol concentration of 10% to 25% the surface tension will be reduced to 35-45 dynes/cm \n\nRubbing Alcohol has a much higher concentration so it would reduce the surface tension even more.  Soap is another compound that reduces the surface tension of water.  Typically compounds that do this kind of thing are called Surfactants.  \n\nSurfactants interact with water by disrupting or modifying the hydrogen bonding network of water. Since this reduces the cohesive forces in water, this leads to reduction in the surface tension
761680
Water, correct? 2 atoms of oxygen... 1 atom of hydrogen. It's a rare 3 sided molecule.\n\nSurface tension is easily demonstrated by filling a glass of water right to the very top, then adding just a few more drops. You will see the water "rise" above the rim of the glass, yet not spill.\nYou can magnetize a pine needle, by rubbing it with a magnet from one end to the other, over and over, and it will float on the water, never getting wet, and behave as a compass, one end pointing north, the other pointing south.\n\nWithout surface tension,  many forms of life would not exist.
20125
All liquids have surface tension, which causes them to stay together (the reason behind bubbles and the reason behind bulged drops). Surface tension is caused by cohesion - attraction between like molecules. When in contact with a surface, water mollecules stick to the surface due to adhesive forces - forces between unlike mollecules. The result is than when a liquid starts to evaporate the outer rim tries to remain attached to the surface. The liquid that is lost in the rim due to evaporation is replensihed by outward flow of liquid from the inner side. The liquid carries solids along with it. When the liuid has fully evaporated it leaves the soilds behind forming the ring.
679701
It´s not only cohesion (taht would only account for the liquid to form a film, but not tho adhere to the surface), but also ADHESION. \nCohesion is the attractant force the liquid molecules exert among each other. \nAdhesion is the attractant force the liquid molecules exert on surfaces. \nThe combination of both, causes the liquid to coat surfaces.
79168
The process is called capillary action.  The surface atoms of the liquid will interact with the surface atoms in a hollow space (such as a tube, or the small spaces between the fibers of a paper towel).  this will cause the liquid to pull itself up the tube, or along the fibers, as it keeps interacting with the next surface molecule.
273222
surfactants- break down the normal surface tension of a liquid.\n\ncosolvents- im acctually not sure, sry
223551
it's a mixture of air and water. when the waves are churning up they mix in air and the combination is what you see as foam. also some minor impurities are present.
340597
there's not too much difference, other than  the density which causes the drag coefficient. however, water has surface tension, which may be slightly important in causing greater drag
1017764
It is due to the hydrogens bonding to the oxygens. Water always easily breaks up into H+ and OH-, and therefore attracts polar molecules. Also, keep in mind things dissolved into water are either polar or nonpolar, so it based on what is being dissovled into water, it can either become ionized  (break into particles that are charged) or not.
304121
ZW88 is partly correct -- the problem is not surface tension.  The toothpicks provide nucleation sites for bubbles to form in a more controlled manner, thus preventing more catastrophic boiling.
30267
If you're talking about the experiment where you put pepper on water and then touch a bar of soap to the surface, it isn't so much that pepper is running from soap, but rather that soap is pushing pepper away.  The pepper floats, suspended by the surface tension of the water.  When soap is added, it is able to reduce the surface tension.  THis makes the soap rapidly diffuse across the surface, and when it does, the water that was on the surface races to the periphery, carrying the soap with it.  If, after the sopa is added, you sprinkle on some more pepper, much of it will float--not quite as much, because the sopa reduced the surface tension and hence reduced the force which keeps the soap up, but it certainly doesn't race away.
899395
What you are seeing is surface tension.  Water molecules have an attraction to each other.  They sort of "hold on" to the water molecules allowing the level to rise without spilling over.  \n\nIf you create the bubble by adding pennies and add a drop of dish detergent you will see that the soap breaks that surface tension and the water will spill.
255080
Capilary action occurs due to Surface tension.\ncapilary action is a phenomenon in which the surface of a liquid is observed to be elevated or depressed where it comes into contact with a solid. For example, the surface of water in a clean drinking glass is seen to be slightly higher at the edges, where it contacts the glass, than in the middle. Capillarity can be explained by considering the effects of two opposing forces: adhesion, the attractive (or repulsive) force between the molecules of the liquid and those of the container, and cohesion, the attractive force between the molecules of the liquid . Adhesion causes water to wet a glass container and thus causes the water's surface to rise near the container's walls. If there were no forces acting in opposition, the water would creep higher and higher on the walls and eventually overflow the container. The forces of cohesion act to minimize the surface area of the liquid ,when the cohesive force acting to reduce the surface area becomes equal to the adhesive force acting to increase it (e.g., by pulling water up the walls of a glass), equilibrium is reached and the liquid stops rising where it contacts the solid. In some liquid-solid systems, e.g., mercury and glass or water and polyethylene plastic, the liquid does not wet the solid, and its surface is depressed where it contacts the solid. Capillarity is one of the causes of the upward flow of water in the soil and in plants.
912906
bubles are formed because the air trapped b/w  the layers of water molecules surface out.due to surface tension of water, a thin film of water traps this water. that's how bubles are formed.