Answer:
The exit temperature is 293.74 K.
Explanation:
Given that
At inlet condition(1)
P =80 KPa
V=150 m/s
T=10 C
Exit area is 5 times the inlet area
Now
![A_2=5A_1](https://tex.z-dn.net/?f=A_2%3D5A_1)
If consider that density of air is not changing from inlet to exit then by using continuity equation
![A_1V_1=A_2V_2](https://tex.z-dn.net/?f=A_1V_1%3DA_2V_2)
So ![A_1\times 150=5A_1V_2](https://tex.z-dn.net/?f=A_1%5Ctimes%20150%3D5A_1V_2)
m/s
Now from first law for open system
![h_1+\dfrac{V_1^2}{2}+Q=h_2+\dfrac{V_2^2}{2}+w](https://tex.z-dn.net/?f=h_1%2B%5Cdfrac%7BV_1%5E2%7D%7B2%7D%2BQ%3Dh_2%2B%5Cdfrac%7BV_2%5E2%7D%7B2%7D%2Bw)
Here Q=0 and w=0
![h_1+\dfrac{V_1^2}{2}=h_2+\dfrac{V_2^2}{2}](https://tex.z-dn.net/?f=h_1%2B%5Cdfrac%7BV_1%5E2%7D%7B2%7D%3Dh_2%2B%5Cdfrac%7BV_2%5E2%7D%7B2%7D)
When air is treating as ideal gas
![h=C_pT](https://tex.z-dn.net/?f=h%3DC_pT)
Noe by putting the values
![h_1+\dfrac{V_1^2}{2}=h_2+\dfrac{V_2^2}{2}](https://tex.z-dn.net/?f=h_1%2B%5Cdfrac%7BV_1%5E2%7D%7B2%7D%3Dh_2%2B%5Cdfrac%7BV_2%5E2%7D%7B2%7D)
![1.005\times 283+\dfrac{150^2}{2000}=1.005\times T_2+\dfrac{30^2}{2000}](https://tex.z-dn.net/?f=1.005%5Ctimes%20283%2B%5Cdfrac%7B150%5E2%7D%7B2000%7D%3D1.005%5Ctimes%20T_2%2B%5Cdfrac%7B30%5E2%7D%7B2000%7D)
![T_2=293.74K](https://tex.z-dn.net/?f=T_2%3D293.74K)
So the exit temperature is 293.74 K.
Answer: False
Explanation: The process in which the thickness of a material is reduced with help of two rolls opposing each other it is called as rolling.It is a type of deformation technique that is done on work piece by using compressive forces exerted by rolls working in the opposite direction of reach other. A draft get created in this process which has the difference of initial and final thickness of work piece. Thus, the statement given is false.
Answer:
Option A (energy transformations) is the correct solution.
Explanation:
- Energy has become a local matter that has been primarily described as the commitment to deal as well as to generate heat. There are several other power sources, which can either be transferred or transformed to several other renewable technologies.
- This same fundamental law defined that the energy required including its universe has been corrected and therefore that energy is being generated as well as severely damaged but should only be moved from one location to the next.
Those certain possibilities are not connected to the circumstance in question. And therefore this answer seems to be the correct one.
Seven colors are in the rainbow haha