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Insolation
They scatter sunlight, reducing the amount that reaches the surface as direct radiation (increasing the amount that reaches as diffuse).
Rough surfaces, the rougher the surface, the greater the friction.
The surfaces used as the measure of lowest friction are generally wet ice on wet ice. Some materials, such as superfluid Helium III have no measurable friction.
wet surfaces like tiles have the least amount oof friction
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black paint
Insolation
Insolation
Solids that are actually glued, or better yet soldered, together.
White surfaces reflect infrared radiation (which includes light and heat), while darker/blacker surfaces absorbinfrared radiation. As a result, lighter/whiter surfaces will be cooler because they reflect heat, and darker/blacker surfaces will be warmer because they absorb heat. The amount by which a surface reflects (or absorbs) infrared radiation is referred to as albedo and is usually expressed as a value between 0 (no reflection) and 1 (perfect reflection).
They scatter sunlight, reducing the amount that reaches the surface as direct radiation (increasing the amount that reaches as diffuse).
hmm. maybe you should pay attentin in school(:
There is no 'why' because that statement is false. The equator is right in the CENTER of the tropics. As the sun wiggles back and forth between the edges of the tropics each year, the equator is the place that receives the MOST average insolation.
The roughness of the two objects coming in contact determines the degree of friction.
The force with which both surfaces are touching and the types of surfaces involved
Rough surfaces, the rougher the surface, the greater the friction.