Engineering, 31.12.2020 18:50, mrsclnantambu9794
A rectangular classroom is to be designed so that it has a total volume of 4000 cubic feet. It must be designed to minimize heat loss. Since warm air rises the heat loss throught the ceiling is 4 times the heat loss through the floor. Th heat loss through any interior wlave is tiwce the heat loss throguh the lfoor. The loss through the outer walls is 3 times that throguh the floor the ceiling must be 10 feet high according to the local building coeds.
Required:
Find the dimensions of the room that minimzie the heat loss assume the room justs out form the rest of the building.
Answers: 3
Engineering, 04.07.2019 18:10, viicborella
Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
Answers: 1
Engineering, 04.07.2019 18:10, johnthienann58
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
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Engineering, 04.07.2019 18:10, kevin72836
Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?
Answers: 2
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