Sunlight, with an intensity of 643 W/m², strikes a flat collecting surface perpendicularly and is totally absorbed. The area of the surface is 8.55 m². What is the force F in micronewtons that acts on the surface due to the sunlight? F = με
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- Suppose that S avg for sunlight at a point on the surface of Earth is 900W/m2. (a) If sunlight falls perpendicularly on a kite with a reflecting surface of area 0.75m2 , what is the average force on the kite due to radiation pressure? (b) How is your answer affected if the kite material is black and absorbs all sunlight?A 150-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the magnitude of the average Poynting vector 10 m from the bulb?Suppose a spherical particle of mass m and radius R in space absorbs light of intensity I for time t. (a) How much work does the radiation pressure do to accelerate the particle (mm rest In the given tine It absorbs the light? (b) How much energy canted by the electromagnetic waves is absorbed by the particle over this time based on the radiant energy incident on the particle?
- A 1-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the radiation pressure on an absorbing sphere of radius 10 m that surrounds the bulb?An incandescent light bulb emits only 2.6 W of its power as visible light. What is the rms electric field of the emitted light at a distance of 3.0 m from the bulb?reaches the ground with an intensity of about 1.0kW/m2 . A sunbather has a body surface area of 0.8 m2 facing the sun while reclining on a beach chair on a clear day. (a) how much energy from direct sunlight reaches the sunbather’s skin per second? (b) What pressure does the sunlight exert if it is absorbed?
- When you stand outdoors in the sunlight, y can you feel the energy that the sunlight carries, but not the momentum it carries?S ry A spherical particle of density p= 5.00 cm W as the Earth. Rsp = 1.5 x 10¹1 m. G= 6.67 x 10-11 Nm² ·S=1365 · Mg = kg² O 5.8 x 10-5. O0.58. particle absorbs 100 percent of the sunlight reaching it, the ratio of the force exerted by the solar radiation to the force of gravity exerted on the particle by the Sun is 1.0. and 2.00-mm radius is located at the same distance from the Sun 1.7. 1.7 x 10. m = 1.99 x 1030 kg. If theAn 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.
- The intensity of sunlight is around 1330 W/m2 at the top of earth’s atmosphere. If the sunlight is all absorbed, what is the force on the earth from sunlight?The energy flux from the sun has a peak value of around 1500 W/m2, and solar cells are around 15% efficient. Estimate the area needed to satisfy US energy needs using solar cells, using the estimates that there are about 350 million people in the US and that we use an average of 90 kW/person. Also assume that there are about 6 hours of "peak" sunlight per day. Answer in square kilometers (do not put units in your answer, however).Sunlight reaches the ground with an intensity of about 1.0 kW/m2 . A sunbather has a body surface area of 0.8 m2 facing the sun while reclining on a beach chair on a clear day. (a) how much energy from direct sunlight reaches the sunbather’s skin per second? (b) What pressure does the sunlight exert if it is absorbed?