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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Conduction

Two slabs share a temperature drop

Two slabs in series have thermal resistances 2 K/W and 3 K/W. Their outer faces differ by 50 K.

Find the steady heat-transfer rate through either slab.

Organize the givens & assumptions
  • R₁ = 2 K/W
  • R₂ = 3 K/W
  • ΔT = 50 K

Steady heat flow through series slabs; no lateral losses or contact resistance; constant thermal resistances.

  1. A25 W25\ \mathrm W
  2. B50/3 W50/3\ \mathrm W
  3. C125/3 W125/3\ \mathrm W
  4. D10 W10\ \mathrm W

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