![subject](/tpl/images/cats/User.png)
Engineering, 05.02.2020 05:44 huangjianhe135
Adouble-wall heat exchanger is constructed of two semi-circular copper ducts held together by exterior straps. each tube has a wall thickness of 3 mm and inner radius of 20 mm. the tube outer surfaces are well-insulated. if hot and cold water at mear temperatures of 330 k and 290 k, respectively flow through the tubes both at 0.2 kg/s, what is the rate of heat transfer per length of tube? assume heat transfer is only across the planar surfaces in contact.
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 03.07.2019 14:10
Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 19:10
Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false
Answers: 3
You know the right answer?
Adouble-wall heat exchanger is constructed of two semi-circular copper ducts held together by exteri...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 05.01.2020 22:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 05.01.2020 22:31
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 05.01.2020 22:31
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/health.png)
Medicine, 05.01.2020 23:31
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2020 23:31
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2020 23:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/pravo.png)
Law, 05.01.2020 23:31
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 05.01.2020 23:31