- A conductor transfers heat of 3000 Ja in 6 seconds. Given cross it's length of 20 cm Hat it's cross-sectional area A is 550m². Determine the thermal conductivity of the material if the temperature difference acroSS the ends is 67°C.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.4P: An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a...
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oii- A conductor transfers heat of 30 J t
OECC oss it's length of
Hiat it's
20 C17
in 6 seconds- Given
cross- sectional airea A is 55om?.
Determine the thermal condluctivity of the
material if the temperature difference across
the ends is
67°C -
ii An object of emisivitiy 0'7 and co5oss-
sectional
of SSmm?
at room tenmpeiature
area
of 30 losses energy
What is the initial temperat ure of the object?
I0=5.6703x 108 W/m/ +]
at
Tate
of 38.65/8.
Transcribed Image Text:oii- A conductor transfers heat of 30 J t OECC oss it's length of Hiat it's 20 C17 in 6 seconds- Given cross- sectional airea A is 55om?. Determine the thermal condluctivity of the material if the temperature difference across the ends is 67°C - ii An object of emisivitiy 0'7 and co5oss- sectional of SSmm? at room tenmpeiature area of 30 losses energy What is the initial temperat ure of the object? I0=5.6703x 108 W/m/ +] at Tate of 38.65/8.
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