Answer:
The temperature T= 648.07k
Explanation:
T1=input temperature of the first heat engine =1400k
T=output temperature of the first heat engine and input temperature of the second heat engine= unknown
T3=output temperature of the second heat engine=300k
but carnot efficiency of heat engine =![1 - \frac{Tl}{Th} \\](https://tex.z-dn.net/?f=1%20-%20%5Cfrac%7BTl%7D%7BTh%7D%20%5C%5C)
where Th =temperature at which the heat enters the engine
Tl is the temperature of the environment
since both engines have the same thermal capacities <em>
</em> therefore ![n_{th} =n_{th1} =n_{th2}\\n_{th }=1-\frac{T1}{T}=1-\frac{T}{T3}\\ \\= 1-\frac{1400}{T}=1-\frac{T}{300}\\](https://tex.z-dn.net/?f=n_%7Bth%7D%20%3Dn_%7Bth1%7D%20%3Dn_%7Bth2%7D%5C%5Cn_%7Bth%20%7D%3D1-%5Cfrac%7BT1%7D%7BT%7D%3D1-%5Cfrac%7BT%7D%7BT3%7D%5C%5C%20%5C%5C%3D%201-%5Cfrac%7B1400%7D%7BT%7D%3D1-%5Cfrac%7BT%7D%7B300%7D%5C%5C)
We have now that
![\frac{-1400}{T}+\frac{T}{300}=0\\](https://tex.z-dn.net/?f=%5Cfrac%7B-1400%7D%7BT%7D%2B%5Cfrac%7BT%7D%7B300%7D%3D0%5C%5C)
multiplying through by T
![-1400 + \frac{T^{2} }{300}=0\\](https://tex.z-dn.net/?f=-1400%20%2B%20%5Cfrac%7BT%5E%7B2%7D%20%7D%7B300%7D%3D0%5C%5C)
multiplying through by 300
-![420000+ T^{2} =0\\T^2 =420000\\\sqrt{T2}=\sqrt{420000} \\T=648.07k](https://tex.z-dn.net/?f=420000%2B%20T%5E%7B2%7D%20%3D0%5C%5CT%5E2%20%3D420000%5C%5C%5Csqrt%7BT2%7D%3D%5Csqrt%7B420000%7D%20%20%5C%5CT%3D648.07k)
The temperature T= 648.07k
Answer:
thickness1=1.4m
thickness2=2.2m
convection coefficient=0.33W/m^2K
Explanation:
you must use this equation to calculate the thickness:
L=K(T2-T1)/Q
L=thickness
T=temperature
Q=heat
L1=0.04*(0--350)/10=1.4m
L2=0.1(220-0)/10=2.2m
Then use this equation to calculate the convective coefficient
H=Q/(T2-T1)
H=10/(250-220)=0.33W/m^2K
Answer: The force exerted on the dough.
Explanation:
The force is responsible for stimulating the stress.
Recall that:
stress= Tensile force/area.