Answer:
∆S1 = 0.5166kJ/K
∆S2 = 0.51826kJ/K
Explanation:
Check attachment for solution
Solution :
Given :
![$V_1 = 7 \ m/s$](https://tex.z-dn.net/?f=%24V_1%20%3D%207%20%5C%20m%2Fs%24)
Operation time,
= 3000 hours per year
![$V_2 = 10 \ m/s$](https://tex.z-dn.net/?f=%24V_2%20%3D%2010%20%5C%20m%2Fs%24)
Operation time,
= 2000 hours per year
The density, ρ = ![$1.25 \ kg/m^3$](https://tex.z-dn.net/?f=%241.25%20%5C%20kg%2Fm%5E3%24)
The wind blows steadily. So, the K.E. = ![$(0.5 \dot{m} V^2)$](https://tex.z-dn.net/?f=%24%280.5%20%5Cdot%7Bm%7D%20V%5E2%29%24)
![$= \dot{m} \times 0.5 V^2$](https://tex.z-dn.net/?f=%24%3D%20%5Cdot%7Bm%7D%20%5Ctimes%200.5%20V%5E2%24)
The power generation is the time rate of the kinetic energy which can be calculated as follows:
Power = ![$\Delta \ \dot{K.E.} = \dot{m} \frac{V^2}{2}$](https://tex.z-dn.net/?f=%24%5CDelta%20%5C%20%5Cdot%7BK.E.%7D%20%3D%20%5Cdot%7Bm%7D%20%5Cfrac%7BV%5E2%7D%7B2%7D%24)
Regarding that
. Then,
Power
→ Power = constant x ![$V^3$](https://tex.z-dn.net/?f=%24V%5E3%24)
Since,
is constant for both the sites and the area is the same as same winf turbine is used.
For the first site,
Power, ![$P_1= \text{const.} \times V_1^3$](https://tex.z-dn.net/?f=%24P_1%3D%20%5Ctext%7Bconst.%7D%20%5Ctimes%20V_1%5E3%24)
![$P_1 = \text{const.} \times 343 \ W$](https://tex.z-dn.net/?f=%24P_1%20%3D%20%5Ctext%7Bconst.%7D%20%5Ctimes%20343%20%5C%20W%24)
For the second site,
Power, ![$P_2 = \text{const.} \times V_2^3 \ W$](https://tex.z-dn.net/?f=%24P_2%20%3D%20%5Ctext%7Bconst.%7D%20%5Ctimes%20V_2%5E3%20%5C%20W%24)
Answer:
<h2>Steel</h2>
Explanation:
Steel is the metal that using in planes.
Aluminum and titanium also used in this aircraft industry.
Aluminum is ideal for aircraft manufacture because it's lightweight and strong.
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Problem Solvers
Explanation:
Engineers find problems in the world, and then they find solutions for them.