(a) Calculate the sun’s energy output assuming the sun is a black body radiator at 5800K...
(a) Calculate the sun’s energy output assuming the sun is a black body radiator at 5800K surface temperature, and its diameter is 1.39E+06 km.
(b) (And) from the earth orbit diameter calculate the energy actually reaching the top of the earth’s atmosphere, and compare it to the solar constant.
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(a) Calculate the sun’s energy output assuming the sun is a
black body radiator at 5800K...
3. The sun can be approximated as a spherical black body with a surface temperature of...
3. The sun can be approximated as a spherical black body with a surface temperature of 5762 K. The irradiation from the sun, as measured by a satellite in earth orbit, is 1353 W/m2. The distance from the earth to the sun is approximately 1.5 x 1011 m. Assuming that the sun radiates evenly in all directions, estimate the diameter of the sun.
About 71 percent of the total incoming solar energy is absorbed by the earth system, the...
About 71 percent of the total incoming solar energy is absorbed by the earth system, the 29% is reflected back to space by clouds, about 23 percent of incoming solar energy is absorbed in the atmosphere by water vapor. The rest (48%) passes through the atmosphere and is absorbed by the surface. If the sun’s diameter is 1,392,000 km, and it emits energy as if it were a black body at 5777 K. Determine the solar heat transfer and heat...
Calculate the average power that the surface of Earth facing the Sun receives from the Sun....
Calculate the average power that the surface of Earth facing the Sun receives from the Sun. Assuming that the Earth is a blackbody and radiates the same amount of power that it absorbs from the Sun, calculate the average surface temperature of the Earth. Does your answer make sense compared to your experience? The Sun’s surface temperature is 5800 K, its radius is 6.96x108 m, the distance between Earth and the Sun is 1.5x1011 m, and the radius of the...
Consider potential radiative energy balance at the surface of the Earth, with the Sun directly overhead...
Consider potential radiative energy balance at the surface of the Earth, with the Sun directly overhead in the sky. Assume that the incident solar radiative flux is reduced passing through the atmosphere to 0.85 times the TOA value, and that 20% of this is reflected at the ground. Calculate the temperature that the surface (radiating as a blackbody) would need to be at in order to be in instantaneous radiative energy balance with the solar radiation. What would you say...
On a given day, solar energy strikes the top of the Earth's atmosphere at 346 W·m−2....
On a given day, solar energy strikes the top of the Earth's atmosphere at 346 W·m−2. About 30. percent of this energy is reflected directly back into space. The Earth-atmosphere system absorbs the remaining energy and re-radiates it into space as black-body radiation at 5.672 ✕ 10−8(T/K)4 W·m−2, where T is the temperature. a) Assuming that the arrangement has come to equilibrium, what is the average black-body temperature (in K) of the Earth? b) Calculate the wavelength (in m) at...
I can see here that for question B Stefan–Boltzmann law was used. However, the energy per unit area is being divided per 4. why? The ratio distance of Mars from the Sun 1.5 6. distance of Earth from...
I can see here that for question B Stefan–Boltzmann law was
used. However, the energy per unit area is being divided per 4.
why?
The ratio distance of Mars from the Sun 1.5 6. distance of Earth from the Sun (a) Show that the intensity of solar radiation at the orbit of Mars is about 600 W m2 (b) Determine, in K, the mean surface temperature of Mars. Assume that Mars acts as a black body. 121 (c) The atmosphere...
What is the heat flux (in W/m^2) from the surface of the sun (assuming black body...
What is the heat flux (in W/m^2) from the surface of the sun (assuming black body behavior)if the surface temperature is 5527 C? Question 10 options: 64.2 E6 1.49 E5 7.53 E6 48.2 E6 1.07 E7 52.9 E6 cannot be determined with the information provided
Part a) Calculate the energy required to lift 1 litre of gasoline from the surface of...
Part a) Calculate the energy required to lift 1 litre of gasoline from the surface of the Earth to an altitude of 3000 km above the surface of the Earth. Use g = 9.81 m s-2, the radius of the Earth is 6371 km, and the density of gasoline is 749 kg m-3. Part b) A planet orbits the Sun in a circular orbit. The force of gravity is the centripetal force of the circular motion. Assuming that potential energy...
1. The solar energy spectral density is shown in the right figure. By assuming that the...
1. The solar energy spectral density is shown in the right figure. By assuming that the sun is a blackbody, use the Planck's distribution function to fit the extraterrestrial solar energy spectral density. Extraterrestrial (a) Determine the most possible surface temperature T of sun by fitting the Planck's distribution to the extraterrestrial solar energy spectral density. You can choose a few temperatures to see which temperature can best fit the peak (at Amsx) and the entire profile of the extraterrestrial...
Answer all parts except the ones refering to lecture slides. Temperatures on planets. To a good...
Answer all parts except the ones refering to lecture slides.
Temperatures on planets. To a good approximation, stars and planets emit their energy like a black body, which means the energy flux (energy per unit area and per unit time) at the solar surface (radius R_s = 7 times 10^8 m) is given by F = sigma_SBT^4, where sigma_SB = 5.67 times 10^8 W m^-2 K^-41 is the Stefan-Boltzmann constant. [Remember, energy per unit time is power and it- is...
I can see here that for question B Stefan–Boltzmann law was
used. However, the energy per unit area is being divided per 4.
why?
The ratio distance of Mars from the Sun 1.5 6. distance of Earth from the Sun (a) Show that the intensity of solar radiation at the orbit of Mars is about 600 W m2 (b) Determine, in K, the mean surface temperature of Mars. Assume that Mars acts as a black body. 121 (c) The atmosphere...
1. The solar energy spectral density is shown in the right figure. By assuming that the sun is a blackbody, use the Planck's distribution function to fit the extraterrestrial solar energy spectral density. Extraterrestrial (a) Determine the most possible surface temperature T of sun by fitting the Planck's distribution to the extraterrestrial solar energy spectral density. You can choose a few temperatures to see which temperature can best fit the peak (at Amsx) and the entire profile of the extraterrestrial...
Answer all parts except the ones refering to lecture slides.
Temperatures on planets. To a good approximation, stars and planets emit their energy like a black body, which means the energy flux (energy per unit area and per unit time) at the solar surface (radius R_s = 7 times 10^8 m) is given by F = sigma_SBT^4, where sigma_SB = 5.67 times 10^8 W m^-2 K^-41 is the Stefan-Boltzmann constant. [Remember, energy per unit time is power and it- is...
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