subject
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.

ansver
Answers: 1

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
question
Engineering, 04.07.2019 18:20
Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.
Answers: 3
question
Engineering, 04.07.2019 18:20
Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?
Answers: 3
question
Engineering, 04.07.2019 18:20
An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
Answers: 3
You know the right answer?
Acomposite wall consists of a 10-cm-thick layer of building brick of thermal conductivity k = 0.7 w/...
Questions
question
Mathematics, 12.08.2020 05:01
question
Mathematics, 12.08.2020 05:01
Questions on the website: 13722359