For small temperature difference, the heat transfer rate as per Newton's law of cooling is proportional to (where, Δt = excess temperature) ?
Correct answer: C. Δt
- A. Δt3
- B. Δt2
- C. Δt
- D. √(Δt)
Explanation
Newton’s law of cooling states that heat-transfer rate is proportional to the excess temperature for small temperature differences: q ∝ Δt. Powers such as Δt² apply to other correlations, not Newton’s law.
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