The heat flux that is applied to the left face of a plane wall is q " = 20 W/m 2 . The wall is of thickness L = 10 mm and of thermal conductivity k = 12 W/m ⋅ K . If the surface temperatures of the wall are measured to be 50 ° C on the left side and 30 ° C on the right side, do steady-state conditions exist?
The heat flux that is applied to the left face of a plane wall is q " = 20 W/m 2 . The wall is of thickness L = 10 mm and of thermal conductivity k = 12 W/m ⋅ K . If the surface temperatures of the wall are measured to be 50 ° C on the left side and 30 ° C on the right side, do steady-state conditions exist?
Solution Summary: The author identifies whether the steady state condition exists or not.
The heat flux that is applied to the left face of a plane wall is
q
"
=
20
W/m
2
.
The wall is of thickness
L
=
10
mm
and of thermal conductivity
k
=
12
W/m
⋅
K
.
If the surface temperatures of the wall are measured to be
50
°
C
on the left side and
30
°
C
on the right side, do steady-state conditions exist?
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Three cables are pulling on a ring located at the origin, as shown in the diagram below. FA is 200 N in magnitude with a transverse angle of 30° and an azimuth angle of 140°. FB is 240 N in magnitude with coordinate direction angles α = 135° and β = 45°. Determine the magnitude and direction of FC so that the resultant of all 3 force vectors lies on the z-axis and has a magnitude of 300 N. Specify the direction of FC using its coordinate direction angles.
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