![subject](/tpl/images/cats/User.png)
Engineering, 11.07.2019 03:20 vanna7353
What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed at 589.6 nm?
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
The higher the astm grain size number, the finer the gran is. a)-true b)-false
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?
Answers: 3
You know the right answer?
What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed a...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/User.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 11.05.2021 03:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 11.05.2021 03:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 11.05.2021 03:50
![question](/tpl/images/cats/mat.png)
Mathematics, 11.05.2021 03:50
![question](/tpl/images/cats/biologiya.png)
Biology, 11.05.2021 03:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 11.05.2021 03:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 11.05.2021 03:50
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 11.05.2021 03:50