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categoryهندسة ميكانيكية
schoolبكالوريوس
event_available2026-07-14
السؤال
Transcribed Image Text:
Q2] (6 Marks)
In the thermos shown, the deepest section is separated from
the middle container by a vacuum. Heat transfer from the
inner section to the next layer q1 is by radiation only (since
the space is evacuated). Heat transfer between the middle
layer and outside shell q2 is by convection in a small. space.
The heat flux from each region of the thermos must be
equal
that is, q1q2. Find the temperature T, at steady
--
state if To is 500 °C and T₂ = 87 °C?
q1 = 10-9 ((To +273) 4 - (T₁ +273)4)
q2= 4 (T1 - T₂)
If the initial gueses are set as 300 °C,
1- Determine tempreature to an absolute error of 0.05 °C by using Fixed Point
method?
2. The number of significant digits at least correct at the end?
1-2
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