The Solar Constant The surface of the Sun has a temperature of 5500 °C. (a) Treating the Sun as a perfect blackbody, with an emissivity of 1.0, find the power that it radiates into space. The radius of the Sun is 7.0 × 10 8 m, and the temperature of space can be taken to be 3.0 K. (b) The solar constant is the number of watts of sunlight power falling on a square meter of the Earth’s upper atmosphere. Use your result from part (a) to calculate the solar constant, given that the distance from the Sun to the Earth is 1.5 × 10 11 m.
The Solar Constant The surface of the Sun has a temperature of 5500 °C. (a) Treating the Sun as a perfect blackbody, with an emissivity of 1.0, find the power that it radiates into space. The radius of the Sun is 7.0 × 10 8 m, and the temperature of space can be taken to be 3.0 K. (b) The solar constant is the number of watts of sunlight power falling on a square meter of the Earth’s upper atmosphere. Use your result from part (a) to calculate the solar constant, given that the distance from the Sun to the Earth is 1.5 × 10 11 m.
The Solar Constant The surface of the Sun has a temperature of 5500 °C. (a) Treating the Sun as a perfect blackbody, with an emissivity of 1.0, find the power that it radiates into space. The radius of the Sun is 7.0 × 108m, and the temperature of space can be taken to be 3.0 K. (b) The solar constant is the number of watts of sunlight power falling on a square meter of the Earth’s upper atmosphere. Use your result from part (a) to calculate the solar constant, given that the distance from the Sun to the Earth is 1.5 × 1011m.
Study of body parts and their functions. In this combined field of study, anatomy refers to studying the body structure of organisms, whereas physiology refers to their function.
25. B. A spherical infrared heater of radius 5.85 cm and an emissivity of 0.71 radiates 0.44 kW of power. Given, Stefan's constant = 5.67x10^-8 Wm^-2K^-4.
Calculate, Temperature of the heater in Celsius:
There is a small high-orbit satellite in space that is generating a lot of waste heat (at the rate of 800 W = 800 J/s) which we need to get rid of by radiation into deep, cold space (temperature 2.73 K). The external radiator of the satellite has a surface area of 1 m by 2 m, and can radiate from only one side. It has an emissivity of 0.99. What is the equilibrium (stable) temperature of the radiator in °C?
a) 30.12 0C
b) 290.54 0C
c) 17.39 0C
he rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*1011 m, and the radius of the sun is 6.96x108 m. if the sun radiates as an ideal black body (e=1), what is the temperature of its surface?
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