Consider a 2 m-high and 0.7 m-wide bronze plate whose thickness is 100mm. One side of the plate is maintained at a constant temperature of 600 K while theother side is maintained at 400 K, as shown in figure below. The thermal conductivity of the bronze plate can be assumed to vary linearly in that temperaturerange as k(T) = k.(1+ $T ) where ko = 38 W /m · K and ß = 9.21x 10-*K-1.-kT) = k,(1 + BT)Bronzeplate7, = 600 KT,- 400 K

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Answered: Consider a 2 m-high and 0.7 m-wide…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question 4 The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4 W/m-K. A heater is used to maintain the room temperature at 22 °C. Take the convection heat transfer coefficients on the outer surface of the window to be 12 W/m²-K. Take appropriate assumptions while solving this problem. (a) T₁-15°C TA -A=1m x 3m 3m², k=1.4 W/m-K I L=0.005m Figure Q2 ** -T₂=5°C Find the convection heat transfer coefficients on the inner surface of the window.
Problem 2- Consider a square bar with a side length of 20 cm as shown in the figure. The lower side of the bar is kept at 70°C, and the left side of the bar is insulated. Thermal çonductivity of the bar is 1.5 W/m°C. The upper and right surfaces of the bar are in contact with the air at 20°C and the heat transfer coefficient on these surfaces are 1oW/m*C. The bar is in steady state condition. Find the 2. temperatures at points 1 and 2 of the bar. 20cm とこがん

Explain the lumped system analysis, focusing on its applicability, advantages and disadvantages. And The steady temperature distribution in a two - layered composite wall is shown in the figure below. Which layer does have higher thermal conductivity and why? .
A cylindrical nuclear fuel rod generates heat at a rate of 71 MW3. It is cooled by fluid at 417 K such that the temperature profile in the rod does not change over time. The heat transfer coefficient between the rod and the fluid is 67 kW/m2K. The rod is 7.5 cm in diameter and has a thermal conductivity of 25 W/mK. Starting from the general conduction equation in cylindrical coordinates, what is the maximum temperature in the rod? Give your answer in Kelvin to the nearest integer.
The exterior wall of a house is composed of a 20 cm thick layer of ordinary brick (conductivity 0.72 W/m K) and a 2.5 cm layer of plaster (conductivity 0.17 W/m K ) on each side (two layers in total). Other purely conductive resistances can be neglected, such as the layer of paint on both sides of the wall. Assume the outer face of the wall is at 35 °C and the inner face is at 20 °C and fill in the gaps. The magnitude of the heat flux through the wall corresponds to the _________ W/m2 and is perpendicular to the wall ________________(fill in with "outside-in" or "inside-out") of the environment. If the wall has a total area of 300m2, the heat transfer rate corresponds to ___________________
In a composite slab, the temperature at the interface (Tinter ) between two materials is equal to the average of the temperature at the two ends. Assuming steady one dimensional heat conduction, which of the following statements is true about the respective thermal conductivities?
A multi-layered wall with the dimensions shown in the figure has temperatures of 200°C and 50°C over the left and right surfaces, respectively. If the thermal conductivities of the wall materials A and C are k-60 W/m-K, k-24 W/m-K. If total rate of heat transfer through the wall is 175 W, what is the thermal conductivity of material B? T- 200°C T-soc 6 cm- 2 om 25 om
A semiconductor material has a conductivity of 0.0124 W/cm-K. It has the shape of a rectangular bar with cross sectional area of 1 cm2and length of 3 cm. One end is maintained at 300 °C and the other end at 100 °C. The bar carries a current of 50 A and has resistivity of 1.5x10-3ohm-cm. Assuming the longitudinal surface is insulated, calculated the midpoint temperature in the bar.
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A wall receives sunlight from 7:30 am to 6:30 pm. The amount of energy it receives is 420 W/m2 and 15% is emitted as radiation into the surrounding air. The inside of the wall has a temperature of 48°C. If the wall is 7 m long and 6 m high and 30 cm thick, what is the temperature when x=20 cm?

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