Why does water bead up on a freshly waxed car?
A freshly waxed car has low adhesive forces with water, so water beads up on the surface, as a consequence of its cohesion and surface tension. … Droplets of water on a freshly waxed car do not wet the car well because of low adhesion between water and the waxed surface. This helps protect the car from rust.
When water forms beads on a surface as it does on the hood of a freshly waxed car?
Why do beads of water often form on a slippery surface, such as a freshly waxed car? The attractive cohesive form between water molecules pull them together to form beads.
Why does water bead up on an oily surface?
This is because water has a property called surface tension. This tension causes water to form a bead on the surface of things like glass or fabric.
What causes cohesion in water?
This sticking together of like substances is called cohesion. Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.
Why does water spread on glass?
Forces of attraction between a liquid and a solid surface are called adhesive forces. … Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.