Answer:28.21 kJ/kg
Explanation:
Given
Process 
Work done for Polytropic process
where n=Polytropic index
![W=\dfrac{0.296(405-300)}{1.3-1}\quad [R_{N_2}=\frac{8.314}{28}]](https://tex.z-dn.net/?f=W%3D%5Cdfrac%7B0.296%28405-300%29%7D%7B1.3-1%7D%5Cquad%20%5BR_%7BN_2%7D%3D%5Cfrac%7B8.314%7D%7B28%7D%5D)
Now Calculating change in Internal energy
Now applying First law concept
The following is a feedback mechanism for a system :
<u>The progress bar when downloading a file on iTunes</u>
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Explanation:
- A feedback mechanism is a loop system wherein the system responds to a perturbation. The response may be in the same direction (as in positive feedback) or in the opposite direction (as in negative feedback).
- Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to feed back into itself.
- Evaluation feedback needs to be done “in the moment” to help the person receiving the feedback know where they stand.
- A feedback control system consists of five basic components: (1) input, (2) process being controlled, (3) output, (4) sensing elements, and (5) controller and actuating devices.
- Because negative feedback produces stable circuit responses, improves stability and increases the operating bandwidth of a given system, the majority of all control and feedback systems is degenerative reducing the effects of the gain.
Answer:
Number of rollers required to complete the compaction are 2
Explanation:
The solution is given in the attachments.
