Consider a large 5-cm-thick brass plate (k = 111 W/m · °C) in which heat is generated uniformly at a rate of 2 x 105 W/m3. One side of the plate is insulated while the other side is exposed to an environment at 25°C with a heat transfer coefficient of 44 W/m2. °C. Explain where in the plate the highest and the lowest temperatures will occur, and determine their value

Consider a large 5-cm-thick brass plate (k = 111 W/m · °C) in which heat is generated uniformly at a rate of 2 x 105 W/m3. One side of the plate is insulated while the other side is exposed to an environment at 25°C with a heat transfer coefficient of 44 W/m2. °C. Explain where in the plate the highest and the lowest temperatures will occur, and determine their value

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

See similar textbooks

Similar questions

A sphere ( k=204 W/m K) with inner diameter 4 cm and outer diameter of 8 cm . The inside temperature is 100C and the outer temperature 50 C . Calculate the rate of heat transfer
Consider a stainless steel spoon ( k = 8.7 Btu/hrft°F) partially immersed in boiling water at 200 deg * F in a kitchen at 75°F. The handle of the spoon has a cross section of 0.08in * 0.5in and extends 7 inches into the air from the free surface of the water. If the heat transfer coefficient at the exposed surfaces of the spoon handle is 3 Btu/hrft²°F, determine the temperature of the tip of the spoon handle. Assume that the heat loss from the tip of the spoon is negligible.
A 0.035-mm-diameter stainless steel wire having k = 16 W/m · ◦C is connected to two electrodes. The length of the wire is 85 cm and it is exposed to a convection environment at 20◦C with h =500 W/m2 · ◦C. A voltage is impressed on the wire that produces temperatures at each electrode of 200◦C. Determine the total heat lost by the wire.
. The roof of a house consists of a 0.70-ft-thick concrete slab (k = 3 W/m · °C) that is 18 mwide and 23 m long. The emissivity of the outer surface of the roof is 0.92, and theconvection heat transfer coefficient on that surface is estimated to be 18 W/m2· °C. Theinner surface of the roof is maintained at 295 K. On a clear winter night, the ambient air isreported to be at 282.15 K while the night sky temperature for radiation heat transfer is260 K. Considering both radiation and convection heat transfer, determine the outersurface temperature and the rate of heat transfer through the roof.
0.3MW / m3 heat is generated in a 6 cm thick flat wall. One surface of the wall is insulated and the other surface is exposed to an environment of 93C. The convection heat coefficient between the wall and the environment is 570 W / m2C and the heat conduction coefficient for the wall is 21 W / Since it is mC, calculate the maximum temperature (T0) inside the wall (C).
The inner and outer surfaces of a 0.5-cm-thick 2-m by 2-m window glass in winter are 10°C and 3°C, respectively. If the thermal conductivity of the glass is 0.78 W/m · °C, determine the rate of heat loss, in Watt, through the glass. What would your answer be if the glass were 1cm thick?
student was asked to do an experiment on a refrigerator test kit during an undergraduate laboratory class in an engineering college. He conducted the experiment for a period of 30 minute and measured that the refrigerated space is maintained at -5°C, while the temperature of the laboratory is 20°C. According to his experiment, it has found that during the experiment the refrigerator draws 1 kWh of electrical energy and 40000 kJ of heat is removed from the refrigerated space. Do you think there is an error in his experiment?