The intensity (i.e. the average power per unit area: I = Pav) of bright sunlight on the earth's kW m² surface is 1 Estimate the total area of solar panels required to supply all the energy needs in the US, assuming solar panel efficiency=1, average power consumption per capita= 1 kW, population: 350 million.

The intensity of sunlight on earth is about 100 mW/cm? (that's milli-Watts per cm squared). If you had a 100% efficient solar panel that was 1m?, could you use it to light a 100W lightbulb? What if it was only 20% efficient (a bit more realistic..)? What's the total power output of the sun? The distance from the sun to earth is about 150 x 10° km.

The incident radiation on the earth's surface can be approximated by Ii = In cos 0, where In = 80 W/m2. sr is the total radiation intensity directed perpendicular to the surface. What is the total irradiation at the surface of the earth?

What area is needed for a solar collector to absorb 45.0 kW of power from the Sun's radiation if the collector is 75.0% efficient? (At the surface of Earth, sunlight has an average intensity of 1.00 × 10³ W/m².)

Assume solar flux falling on a typical panel on planet earth to be 1370 Watts per square meter with sunshine at least half of the year and roughly one quarter of the earth surface bathed in sunlight daily as the planet rotates. The best panels convert photonic energy to electrical energy at about 25 % (efficiency). Given that the world consumes around 600 exaJoules (one exaJ = 1028 J) how much area would be required to power up the world with solar arrays. (Give your answer in square kilometers please!)

Problem: Radiation Related   The energy flux associated with solar radiation incident on the outer surface of the earth's atmosphere has been accurately measured and is known to be 1,368 W/m^2. The diameters of the sun and earth are 1.39 X 10^9 and 1.27 x 10^7 m, respectively, and the distance between the sun and the earth is 1.5 × 10^11 m.   (a) What is the emissive power of the sun? (b) Approximating the sun's surface as black, what is its temperature? (c) At what wavelength is the spectral emissive power of the sun a maximum? (d) Assuming the earth's surface to be black and the sun to be the only source of energy for the earth, estimate the earth's surface temperature.

The average intensity of sunlight on Earth’s surface is about 1000 ? ?2 ⁄  a. Calculate the solar panel area if the amount of energy that falls on it in 10 hours is 3 × 1012J.b. What intensity would such sunlight have if concentrated by a magnifying glass onto an area 100 times smaller than its own?

If a radiation source gives 75 units of radiation at a distance of 2.4 m, at what distance does the source give 25 units of radiation?

In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in dollars, to at least two decimal places.) (a) How much does it cost to operate an old-style incandescent 40.0-W light bulb continuously for 24 hours? $  (b) A modern LED light bulb that emits as much visible light as a 40.0-W incandescent only draws 4.50 W of power. How much does it cost to operate this bulb for 24 hours? $  (c) A particular electric oven requires a potential difference of 220 V and draws 20.0 A of current when operating. How much does it cost to operate the oven for 4.30 hours? $

The temperature of the sun is about 6000°K and its radius is about 6.69 x108km. What rate does energy of radiation?