The two objects in the drawing are made from the same material (emissivity = 0.500) and have a temperature of 323 K. One is a cube ofedge length ro = 0.280 m, and the other is a sphere of radius ro. They are placed in a room whose temperature is 435 K. What is themagnitude of the difference between the net power absorbed by the cube and the sphere? The surface area of a sphere is 4πr².TOTO

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Answered: The two objects in the drawing are made…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter11: Energy In Thermal Processes

Section: Chapter Questions

Problem 58AP: The surface area of an unclothed person is 1.50 m2, and his skin temperature is 33.0C. The person is...

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The surface area of an unclothed person is 1.50 m2, and his skin temperature is 33.0C. The person is located in a dark room with a temperature of 20.0C, and the emissivity of the skin is e = 0.95. (a) At what rate is energy radiated by the body? (b) What is the significance of the sign of your answer?
The surface area of an unclothed person is 1.50 m2, and his skin temperature is 33.0C. The person is located in a dark room with a temperature of 20.0C, and the emissivity of the skin is e = 0.95. (a) At what rate is energy radiated by the body? (b) What is the significance of the sign of your answer?
A class of 10 students taking an exam has a power output per student of about 200 W. Assume the initial temperature of the room is 20°C and that its dimensions are 6.0 m by 15.0 m by 3.0 m. What is the temperature of the room at the end of 1.0 h if all the energy remains in the air in the room and none is added by an outside source? The specific heat of air is 837 J/kg . °C, and its density is about 1.3 x 10-3 g/cm3.
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To illustrate the effect of ice on the aluminum cooling plate, consider the drawing shown here and the data that it contains. Ignore any limitaions due to significant figures. How much heat per second per square meter is conducted through the ice-aluminum combination and through the aluminum by itself? combination: 6580 J/(s m2), aluminum only: 6580 J/(s m2) combination: 2400000 J/(s m2), aluminum only: 2400000 J/(s m2) combination: 2400000 J/(s m2), aluminum only: 6580 J/(s m2) combination: 6580 J/(s m2), aluminum only: 2400000 J/(s m2)
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