![subject](/tpl/images/cats/fizika.png)
Physics, 19.10.2019 05:10 carmenala2
Standards for firewalls may be based on their thermal response to a prescribed radiant heat flux. consider a 0.25-m-thick concrete wall ( 2300 kg/m^3, 880 j/kg·k, 1.4 w/m·k), which is at an initial temperature of 25°c and irradiated at one surface by lamps that provide a uniform heat flux of 0.75·104 w/m^2. the absorptivity of the surface to the irradiation is 1.0. if building code requirements dictate that the temperatures of the irradiated and back surfaces must not exceed 325°c and 25°c, respectively, after 30 min of heating, will the requirements be met?
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 01:30, haileysolis5
The flow of electrons from one atom to another is called
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 01:30, missfuture2020p5umxt
Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 06:30, deebroussard
Pl i beg u so much now propane burns in oxygen to produce carbon dioxide and steam. the unbalanced equation for this reaction is: c3h8 + o2 → co2 + h2o use coefficients to balance this equation. a) c3h8 + 3 o2 → 3 co2 + 4 h2o b) c3h8 + o2 → 3 co2 + 4 h2o c) c3h8 + 5 o2 → 3 co2 + 4 h2o d) 2 c3h8 + 5 o2 → 3 co2 + 4 h2o
Answers: 1
You know the right answer?
Standards for firewalls may be based on their thermal response to a prescribed radiant heat flux. co...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
Mathematics, 26.05.2020 21:57
![Konu](/tpl/images/cats/mat.png)
Mathematics, 26.05.2020 21:57
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 26.05.2020 21:57
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 26.05.2020 21:57
![Konu](/tpl/images/cats/mat.png)
Mathematics, 26.05.2020 21:57