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Why do beads of water often from on a slippery surface such as a freshly waxed car?
Short answer:Water beads form on a surface when the cohesion of the water molecules with each other is much greater than the adhesion of the water to the surface. Water cohesion results in water having high surface tension and hence a strong tendency to form spherical droplets. Water adhesion to waxy or oily materials is small. The result is a tendency to form water beads.This phenomena, or the lack there of, is called wetting and has been studied for centuries. The cohesion of a liquid is directly related to the surface tension of a liquid. Water, which has a high surface tension, readily forms beads on materials which are hydrophobic, i.e. materials with a small adhesion to water. The waxed surface of a car has small adhesion and so water beads form regularly. The raw painted surface of the car would have more adhesion with water and so greater wettability. The opposite extreme, the tendency of a liquid to wet a surface due to strong adhesion, is critical to a situation such as lubrication where the liquid should coat the solid surface. It is the two properties combined, adhesion and cohesion, which determine wettabilty and beading.Long Answer:When one speaks of water beading on a surface, one means the formation of small droplets of water on a surface. This phenomena depends not only on the properties of water and the surface, but most importantly on the property of the interaction of the water with the surface. In science, this is the topic of "wetting" and one describes the tendency in terms of the "wettability" of a particular combination of liquid and surface. Beading is a manifestation of low wettability or little wetting.A liquid droplet on a surface tends to form a more nearly spherical shape if the forces of attraction (or cohesion) between the liquid molecules is strong and the forces between the liquid and and the solid (adhesion) are weak. We associate strong cohesive forces of a liquid with a high surface tension and a high surface tension opposes wetting. Water is an example of a liquid with high surface tension.The interaction of water with a surface like wax or plastic or Teflon is an example weak adhesion or weak forces between the liquid molecules and solid surface. Thus, wetting is highly unfavorable and formation of nearly spherical droplets is favored and we say water beads. Surfaces like metal or glass have somewhat stronger adhesive forces so wetting is greater and droplets are less spherical.
How far does water travel vertical through wood?
it depends on the grain of the wood and the thickness however standard un waxed or treated wood, it would take several hours for the water to travel vertical through the wood. however another factor would consist of the amount of water as well.
A bug sits on the very top of a freshly waxed bowling ball it loses its footing and slides freely down the side of the ball explain why the buy wi?
Centripetal force is provided by weight minus reaction equals centripetal force. It is towards the center of the bowling ball. When the bug is sliding down it will reach a point at which there is no force acting towards the center of the ball and the weight is acting vertically.
What other surfaces does water bead up on?
Surfaces on which water beads are called hydrophobic surfaces. That is, the water "fears" the surface. Water tends to bead up on these types of surfaces because it is more strongly attracted to itself (other water molecules) than the surface molecules. Common hydrophobic surfaces include waxes, Teflon, and most plastics.
Why is a waxed floor slippery to walk on?
Burnish it with a red pad at low speed and it will not be slippery anymore
Which property of water causes drops on a freshly waxed car?
This phenomenon is called surface tension.
Which property of water causes water drops to bead on s freshly waxed car?
Water molecules are sticky due to hydrogen bonds
Why do beads of water often form on a slippery surface such as a freshly waxed car?
A waxed car is not hydrophilic, it is not wetted with water. A drop of water falling on such a surface does not speak out wetting the surface. Instead the surface tension of the water drop pulls it into a spherical shape that sits on top of the surface until it either slides off or evaporates.
When can a freshly painted car be waxed?
No
Why does water bead up on a waxed car but gasoline spreads out?
A waxed car is not hydrophilic, it is not wetted with water. A drop of water falling on such a surface does not speak out wetting the surface. Instead the surface tension of the water drop pulls it into a spherical shape that sits on top of the surface until it either slides off or evaporates.
A bug sits on the very top of a freshly waxed bowling ball It loses its footing and slides freely down the side of the ball Why does the bug leave the surface before falling halfway down the ball?
i hav no idea, because it doesnt want to get crushed by the ball or because it didnt think that anything was happening b/c it was freshly waxed until the bug started to fall and realize it
Why does water bead up on freshly waxed car?
Wax is hydrophobic, meaning it repels water. Of course, this repulsion is not strong enough to make the water hover a millimeter above the surface, but it is strong enough to force the water to act in this way, rather than sit there in a thin sheet. The "surface tension" of the water itself also plays a role.
Why does a dew have a teardrop shape?
I assume you mean the bubble-ish look when it sits on leaves or grass. This is caused by the hydrophobic nature of the surface of leaves, blades, or needles. This same affect appears on freshly-waxed cars because the wax repells water. Same for lumber that has been treated with a protectant.
What property of water is demonstrated when you see beads of water on a waxed car hood?
surface tension, caused by the high attraction of water molecules for other water molecules.
What sre some examples of cohesion?
Some examples of cohesion include water sticking to a waxed car, water beads on the floor and rain drops. Cohesion is the ability of water molecules sticking together.
Would mercury bead up more on a waxed or unwaxed car?
Short Answer:One expects mercury, like water, to bead more on a waxed surface and less on a painted or metallic surface.Explanation:The phenomena of beading of any liquid depends on the density of the liquid and the interfacial surface tension between the liquid and the surface with which it is in contact.Mercury has a large surface tension normally. The mercury-air interface has a surface tension of about 482 dynes/cm compared to water-air which is about 72 dynes/cm. Both of these are larger than most other liquids. The water-mercury interface has a surface tension of 415 dynes/cm.Both water and mercury decrease surface tension when in contact with a polar medium such as an alcohol.Wax is very non-polar while paint is presumably slightly polar. Of course, metal would be more polar. (Perhaps polarizable is a better term.) One expects mercury, like water, to bead more on a waxed surface and less on a painted or metallic surface.
What is lupus slipaphobia?
a strange fear of being chased around your dining room table by a pack of timber wolves in wool socks on a freshly waxed floor
