Page 32 - Digital Book Bilingual Perpindahan Kalor
P. 32
example
example
A homogeneous iron rod is heated at one end. The rod has a cross-
sectional area of 17 cm² and a thermal conductivity of 4 × 10⁵ J
m⁻¹ s⁻¹ °C⁻¹. The length of the rod is 1 m, and the temperature
difference between its two ends is 30°C. The amount of heat
conducted through the iron rod in 2 seconds is …
a n s w e
a n s w e r r
Given:
A = 17 cm² = 17 × 10⁻⁴ m²
k = 4 × 10⁵ J m⁻¹ s⁻¹ °C⁻¹
L = 1 m
ΔT = 30°C
t = 2 s
A metal rod with a length of 2 meters has a cross-sectional area
of 20 cm², and the temperature difference between its two ends
is 50°C. If the thermal conductivity of the rod is 0.2 cal m⁻¹ s⁻¹
°C⁻¹, determine the rate of heat flow.
a n s w e
a n s w e r r
Given:
L = 2 m
A = 20 cm² = 20 × 10⁻⁴ m²
k = 0,2 kal m⁻¹ s⁻¹ °C⁻¹
ΔT = 30°C
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