Concept explainers
Engineering Application
(a) A photovoltaic array of (solar cells) is 10.0% ef?cient in gathering solar energy and converting it to electricity. If the average intensity of sunlight on one day is
Want to see the full answer?
Check out a sample textbook solutionChapter 16 Solutions
College Physics
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
Physics: Principles with Applications
University Physics Volume 1
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Essential University Physics: Volume 2 (3rd Edition)
- The Earth has a radius of 6.38 x 106 m and is 1.50 x 1011 m from the Sun. The intensity of sunlight at the Earth is 1370 W/m2. a) At what rate does the Sun radiate energy? (This is the total power radiated by the Sun.) b) A solar sail is a large perfect reflector that gets pushed by the Sun's radiation. If there is a 2.5 km x 25. km solar sail that is perpendicular to the sun's radiation at the Earth's distance from the Sun, then what is the total radiation force of sunlight on the sail? c) What is the intensity of sunlight at Jupiter at a distance of 7.78 x 1011 m from the Sun?arrow_forwardThe mean distance between the Earth and the Sun is 1.50 x 10 m. The average intensity of solar radiation incident on the upper atmosphere of the Earth is 1390 W/m. Assuming that the Sun cmits radiation uniformly in all directions, determine the total power radiated by the Sun.arrow_forwardWhat 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.)arrow_forward
- The intensity of solar radiation at the top of the Earth's atmosphere is 1 370 W/m². Assuming 60% of the incoming solar energy reaches the Earth's surface and you absorb 50% of the incident energy, make an order-of-magnitude if you sunbathe for 60 minutes. estimate of the amount of solar energy you absorbarrow_forwardThe intensity of solar radiation at the top of the Earth’s atmosphere is 1 370 W/m2. Assuming 60% of the incoming solar energy reaches the Earth’s surface and you absorb 50% of the incident energy, make an order-of-magnitude estimate of the amount of solar energy you absorb if you sunbathe for 60 minutes.arrow_forwardYou are designing a solar car with a total roof area for solar cells of 6.4m². Calculate the electrical power available, assuming total cell efficiency of 17% and a constant light intensity of 980 W/ m².arrow_forward
- 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.arrow_forward(A) What is Eo 2.00 m from a 95-W light source?(Assume the bulb emits radiation of a single frequency uniformly in all directions.) (B) What is Bo 2.00 m from a 95-W light source?arrow_forwardA hanging lamp with a 70-W omni-directional bulb has a hemi-spherical lamp shade of height, H = 0.55 m, as shown below. (a) Find the total (average) power received across the shade. W (b) Calculate the intensity at a point on the shade. W/m²arrow_forward
- An earth-orbiting satellite has solar energy–collecting panels with a total area of 4.0 m2 . If the sun’s radiation is perpendicular to the panels and is completely absorbed, find the average solar power absorbed and the average radiation-pressure force.arrow_forward(a) Calculate the rate in watts at which heat transfer through radiation occurs (almost entirely in the infrared) from 1.0 m2 of the Earth’s surface at night. Assume the emissivity is 0.90, the temperature of the Earth is 15ºC , and that of outer space is 2.7 K. (b) Compare the intensity of this radiation with that coming to the Earth from the Sun during the day, which averages about 800 W/m2, only half of which is absorbed. (c) What is the maximum magnetic field strength in the outgoing radiation, assuming it is a continuous wave?arrow_forwardThe average intensity of sunlight on Earth’s surface is about 700 W/m2 . (a) Calculate the amount of energy that falls on a solar collector having an area of 0.500 m2 in 4.00 h . (b) What intensity would such sunlight have if concentrated by a magnifying glass onto an area 200 times smaller than its own?arrow_forward
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University