At high noon (sun rays fall perpendicular to the surface of the earth), the sun delivers 990 W to each square meter of a blacktop road, emissivity of 1 (blackbody). If the hot asphalt loses energy only by radiation, what is its equilibrium temperature?
I have everything except area. How do I find area?
To find the area, we need to know the dimensions of the blacktop road. The area can be calculated by multiplying the length and the width of the road.
If you have the length and width measurements of the road, multiply them together to get the area. For example, if the road is 10 meters long and 5 meters wide, the area would be 10 meters x 5 meters = 50 square meters.
Once you have the area, you can proceed with the rest of the calculation to determine the equilibrium temperature.
To find the area, you need to have additional information about the road's dimensions. The area is a measure of the surface covered by an object, so in this case, it would be the total surface area of the blacktop road that is exposed to the sunlight.
If you have the dimensions of the blacktop road, such as length and width, you can use the formula for the area of a rectangle:
Area = length × width
Measure the length and width of the road, and then multiply these values together to get the area. Make sure the lengths and widths are in the same unit (e.g., meters) so that the resulting area will also be in that unit.
If the road has a more complex shape, such as curves or irregular edges, determining the area might require more advanced mathematical techniques or physical measurements. In such cases, it would be necessary to use tools like a measuring tape or laser measuring devices to determine the dimensions accurately.
Once you have the area, you can then proceed to calculate the equilibrium temperature using the given information about the sun's power and the blacktop road's emissivity.