Answer:
A key element is powering economies with clean energy, replacing polluting coal - and gas and oil-fired power stations - with renewable energy sources, such as wind or solar farms. This would dramatically reduce carbon emissions. Plus, renewable energy is now not only cleaner, but often cheaper than fossil fuels
Explanation:
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Ceramics must be heated in order to harden the clay and make it durable. The tool used to heat the clay is called a Kiln.
<h3>What happens when ceramic is heated?</h3>
Cristobalite is a silica polymorph that is used in ceramics. Quartz particles in porcelain can change into cristobalite during burning. This has effects on the fired matrix's thermal expansion. When there is a high level of vitrification or a shape is unstable during the firing of ceramic ware, warping occurs.
Ceramic items are porous, brittle, and rigid. They are thus employed in the production of glass, ceramics, cement, and bricks. Additionally, ceramics are employed extensively in gas turbine engines. Artificial bones and dental implants are both made of bio-ceramics.
Any of the several tough, fragile, heat- and corrosion-resistant materials created by sculpting and then heating an inorganic, nonmetallic material like clay to a high temperature are known as ceramics.
In order to solidify the clay and make ceramics durable, heat must be applied. A kiln is the name of the device used to heat clay.
To learn more about ceramics refer to:
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If the temperature of the shield is 338 kelvin. Then the heat flux through the tank will be 25.3 Watt per square meter.
<h3>What is heat flux?</h3>
The increase in heat energy movement through a particular surface is known as heat flux, and the heat flux density is the absolute temperature per unit area.
Assume the view factor between the tank and the shield is unity; all surfaces are diffuse and gray, and the surroundings are at 0 K.
It is given that T= 100 K, ε₁ = ε₂ = 0. 10, 
= 0.20, and GS= 1250 W/m².
Then we have
The temperature of the shield will be
...1
and
...2
Then from equations 1 and 2, we have
Then the value of 
will be
![\rm T_s =\left [ \dfrac{\alpha _sGs+\left ( \dfrac{\sigma T_1^4}{\frac{1}{\varepsilon _1}+\frac{1}{\varepsilon _2} - 1} \right )}{\sigma \left ( \varepsilon _1 + \dfrac{1}{\frac{1}{\varepsilon _1} + \frac{1}{\varepsilon _2}-1} \right )} \right ] ^{\dfrac{1}{4}}](https://tex.z-dn.net/?f=%5Crm%20T_s%20%3D%5Cleft%20%5B%20%5Cdfrac%7B%5Calpha%20_sGs%2B%5Cleft%20%28%20%5Cdfrac%7B%5Csigma%20T_1%5E4%7D%7B%5Cfrac%7B1%7D%7B%5Cvarepsilon%20_1%7D%2B%5Cfrac%7B1%7D%7B%5Cvarepsilon%20_2%7D%20-%201%7D%20%5Cright%20%29%7D%7B%5Csigma%20%5Cleft%20%28%20%5Cvarepsilon%20_1%20%2B%20%5Cdfrac%7B1%7D%7B%5Cfrac%7B1%7D%7B%5Cvarepsilon%20_1%7D%20%2B%20%5Cfrac%7B1%7D%7B%5Cvarepsilon%20_2%7D-1%7D%20%5Cright%20%29%7D%20%5Cright%20%5D%20%5E%7B%5Cdfrac%7B1%7D%7B4%7D%7D)
Put all the values, then we have
![\rm T_s = \left [ \dfrac{0.05 \times + \left ( \dfrac{\sigma (100)^4}{\frac{1}{0.1}+\frac{1}{0.05}-1} \right )}{\sigma \left ( 0.05 + \dfrac{1}{\frac{1}{0.1}+\frac{1}{0.05} - 1} \right )} \right ]^{\dfrac{1}{4}} \\\\\\T_s = 338 \ K](https://tex.z-dn.net/?f=%5Crm%20T_s%20%3D%20%5Cleft%20%5B%20%5Cdfrac%7B0.05%20%5Ctimes%20%2B%20%5Cleft%20%28%20%5Cdfrac%7B%5Csigma%20%28100%29%5E4%7D%7B%5Cfrac%7B1%7D%7B0.1%7D%2B%5Cfrac%7B1%7D%7B0.05%7D-1%7D%20%5Cright%20%29%7D%7B%5Csigma%20%5Cleft%20%28%200.05%20%2B%20%5Cdfrac%7B1%7D%7B%5Cfrac%7B1%7D%7B0.1%7D%2B%5Cfrac%7B1%7D%7B0.05%7D%20-%201%7D%20%5Cright%20%29%7D%20%5Cright%20%5D%5E%7B%5Cdfrac%7B1%7D%7B4%7D%7D%20%5C%5C%5C%5C%5C%5CT_s%20%3D%20338%20%5C%20K)
Then the heat flux will be
More about the heat flux link is given below.
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Answer:
An airfoil creates lift by exerting a downward force on the air as it flows past
Answer:
The answer is "0.0728"
Explanation:
Given value:
if 
flow is chocked
if 
flow is not chocked
When P= 10 psia < 
not chocked
match number:
![\ for \ P= \ 10\ G= \sqrt{\frac{2}{k-1}[(\frac{\ p_{0}}{p})^{\frac{k-1}{k}}-1]}](https://tex.z-dn.net/?f=%5C%20for%20%5C%20P%3D%20%5C%2010%5C%20G%3D%20%5Csqrt%7B%5Cfrac%7B2%7D%7Bk-1%7D%5B%28%5Cfrac%7B%5C%20p_%7B0%7D%7D%7Bp%7D%29%5E%7B%5Cfrac%7Bk-1%7D%7Bk%7D%7D-1%5D%7D)
![= \sqrt{\frac{2}{1.4-1}[(\frac{14.696}{10})^{\frac{1.4-1}{1.4}}-1]}](https://tex.z-dn.net/?f=%3D%20%5Csqrt%7B%5Cfrac%7B2%7D%7B1.4-1%7D%5B%28%5Cfrac%7B14.696%7D%7B10%7D%29%5E%7B%5Cfrac%7B1.4-1%7D%7B1.4%7D%7D-1%5D%7D)
R= gas constant=1716
