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The warmth of sunlight is an effect of the absorption of the electromagnetic radiation by a surface. If an object were totally transparent or totally reflective, the sunlight would not warm it up.
The two factors on which friction depends are as follows 1. Area of contact 2. Mass of object
1.the speed 2.air 3.force
Surface area and temperature gradient
convection & conduction:)
There is absorption of radiation inside or outside of the object
[object Object]
Size, Contour, Color, Value, Texture, and Position are the 6 factors that influence the visual weight of an object. - Sincerly, You're Welcome P.S. Ha-Ha
The warmth of sunlight is an effect of the absorption of the electromagnetic radiation by a surface. If an object were totally transparent or totally reflective, the sunlight would not warm it up.
The hotter the object the more it radiates. The blacker the surface the more it radiates. The surrounds only affect the total loss of heat from the object, not the actual rate the object emits thermal radiation. From my imperfect memory I seem to recall that the rate an object looses heat by radiation to its environment is proportional to the forth power of the difference in temperature between the object and the environment.
An object is a good emitter of radiation if it is a good absorber of radiation.
The two factors on which friction depends are as follows 1. Area of contact 2. Mass of object
1.the speed 2.air 3.force
Surface area and temperature gradient
convection & conduction:)
absorption
radiation from object decreases as the temperature rises