![subject](/tpl/images/cats/User.png)
Engineering, 26.03.2020 22:21 MyaaaMoney
Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 50 m/s and exits at 85 kPa and 320 m/s. The heat losses from the nozzle to the surroundings medium at 20°C are estimated to be 3.2 kJ/kg. Determine (a) the exit temperature and (b) the entropy generation for this process. Assume that the air has variable specific heats.
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
![question](/tpl/images/cats/User.png)
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](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
You know the right answer?
Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 50 m/s and exits at 85 kPa and 3...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 18.02.2021 07:40
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
Physics, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/es.png)
Spanish, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/himiya.png)
Chemistry, 18.02.2021 07:40
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.02.2021 07:40