Temperature-Dependent Thermal Conductivity
A material has thermal conductivity that varies with temperature according to k = k₀(1 + αT), where k₀ and α are constants. If a slab of this material has thickness L and faces at temperatures T₁ and T₂ (T₁ > T₂), which expression best approximates the heat transfer rate per unit area?
A
k₀(T₁-T₂)/L
B
k₀(1 + αT₁)(T₁-T₂)/L
C
k₀(1 + α(T₁+T₂)/2)(T₁-T₂)/L
D
k₀(1 + α√(T₁T₂))(T₁-T₂)/L
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | deyarfaraj0 | 1 | 1 | 1m 53s | -13 |
| #2 | eddiegao521 | 1 | 3 | 2m 25s | -65 |
| #3 | arob8150 | 0 | 1 | 0m 58s | -68 |
Items per page:
10
1 – 3 of 3