Explanation:
R ∝ L, inversely proportional to A. Longer wire more resistance. Thicker wire less resistance. R = ρL/A. Resistivity ρ constant for material.
Explanation:
The thermal efficiency (η) of a reversible Carnot engine depends exclusively on the absolute temperatures of the hot source (T1) and the cold sink (T2). The formula is η = 1 - (T2/T1), or (T1 - T2) / T1. Temperatures must be in Kelvin. It shows no engine can be 100% efficient unless the sink is at absolute zero.
No comments yet. Be the first to start the discussion!