Physics

Physics, 08.09.2019 18:10, taibamah

Why should insulating material be as thick as
practicable?

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Physics, 24.07.2019 19:10, cxttiemsp021

Exercise 10 - a pipe 10 cm in diameter contains steam at 200℃. it is covered with an insulating material that is 5 cm thick. this insulating material has a constant of thermal conductivity k = 0.00060 cal/cm2 sec. the outside surface of the system is 35℃. find the heat loss per hour from a 2 meter length of the pipe.

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Physics, 14.09.2019 09:20, anaislewis457

Ineed both parts (a) given a material with an attenuation coefficient (a) of 0.6/cm, what is the intensity of a beam (with an incident intensity, lo) after it has traveled through 1 cm of the material? after it has traveled through 2 cm of the material? (b) what is the optical density of a 1 cm thick piece of such a material? of a 2 cm thick piece of such a material?

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Physics, 21.09.2019 02:10, ratpizza

Ineed both parts (a) given a material with an attenuation coefficient (a) of 0.6/cm, what is the intensity of a beam (with an incident intensity, lo) after it has traveled through 1 cm of the material? after it has traveled through 2 cm of the material? (b) what is the optical density of a 1 cm thick piece of such a material? of a 2 cm thick piece of such a material?

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Engineering, 05.10.2019 13:30, omarabady

Acomposite wall consists of a 10-cm-thick layer of building brick of thermal conductivity k = 0.7 w/(m • °c) and 3-cm-thick plaster of thermal conductivity k = 0.5 w/(m • °c). an insulating material of thermal conductivity k = 0.08 is to be added to reduce the heat transfer through the wall by 70 percent. determine the thickness of the insulating layer.

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