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

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

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 70P: reaches the ground with an intensity of about 1.0kW/m2 . A sunbather has a body surface area of 0.8...

See similar textbooks

Similar questions

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 the
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?
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?
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.)
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).
Humans are unable to convert radiant energy from the sun into stored energy that can be usedto do work. Plants, however, obtain their energy from photosynthesis – sunlight is used toconvert carbon dioxide and water into sugars (stored as an energy source) and oxygen.Consider a leaf with a surface area of 2.5 cm2. On a sunny day it might receive sunlight withan average power per unit area of 350 W/m2. Of this incident light, only about 40% is usefulfor photosynthesis. (a) If the process was perfectly efficient (i.e. all the useful radiation was converted tostored internal energy), calculate the increase in internal energy of the leaf in aperiod of one hour. (b) In practice, the overall efficiency of the process (percentage of energy storedrelative to the total incident energy reaching the surface of the leaf) is only about6%. Discuss, in relation to the First Law of Thermodynamics, what happens to theremaining energy?
The speed of all empty space is 3.00 × 108 m/s. electromagnetic waves in a) What is the wavelength of radio waves emitted at 98.9 MHz? Answer in units of m. b) What is the wavelength of visible light emitted at 5.9 × 108 MHz? Answer in units of m. c) What is the wavelength of X rays emitted at 3.1 x 10¹2 MHz? Answer in units of m.
A possible means of space flight is to place a perfectly reflecting aluminized sheet into orbit around the Earth and then use the light from the Sun to push this "solar sail." Suppose a sail of area A = 6.40 ✕ 105 m2 and mass m = 4,900 kg is placed in orbit facing the Sun. Ignore all gravitational effects and assume a solar intensity of 1,370 W/m2. A) If the solar sail were initially in Earth orbit at an altitude of 360 km, show that a sail of this mass density could not escape Earth's gravitational pull regardless of size. (Calculate the magnitude of the gravitational field in m/s2.) B) What would the mass density (in kg/m2) of the solar sail have to be for the solar sail to attain the same initial acceleration of 1193 µm/s2.
One of the highest power lasers in the world sits on a table. It emits pulses that last approximately 16 fs, and contain 103 mJ of energy. "fs" indicates a femtosecond, which is 10-15 seconds. a) What is the average power associated with a single pulse? b) What is the physical length of this pulse? c) When the beam exits the laser, it is approximately 30 mm in diameter. Molecules begin to ionize when applied electric fields reach approximately 8.680e+09 V/m. To what diameter must the beam be focused to reach this electric field strength?
If emissivity of the body is equal to 1 and Stefan constant= 5.7x10-8 watt/m?. k°. when a person is exchanging radiation energy with the environment of temperature 25c° and the skin temperature is 33c°. Find the area of the person in order to radiate 65.9 J/sec O 1.2 m2 1.61 m2 O 1.32 m2
A 1.00-m² solar panel on a satellite that keeps the panel oriented perpendicular to radiation arriving from the Sun absorbs 1.40 kJ of energy every second. The satellite is located at 1.00 AU from the Sun. (The Earth-Sun distance is approximately 1.00 AU.) How long would it take an identical panel that is also oriented perpendicular to the incoming radiation to absorb the same amount of energy, if it were on an interplanetary exploration vehicle 2.85 AU from the Sun? S
A 1.00-m2 solar panel on a satellite that keeps the panel oriented perpendicular to radiation arriving from the Sun absorbs 1.40 kJ of energy every second. The satellite is located at 1.00 AU from the Sun. (The Earth-Sun distance is approximately 1.00 AU.) How long would it take an identical panel that is also oriented perpendicular to the incoming radiation to absorb the same amount of energy, if it were on an interplanetary exploration vehicle 2.05 AU from the Sun? answer in seconds