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What winds are classified as Light air as per the Beaufort scale?
A: 2-5 km/h
B: 10-12 km/h
C: 18-21 km/h
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Description:

The correct answer is:

✅ 1–5 km/h (or 1–3 mph)

Beaufort Scale: "Light Air" (Force 1)

Wind Speed: 1–5 km/h (0.3–1.5 m/s).

Effects:

Smoke drifts lazily.

Water surfaces appear glassy (no waves).

Category: The weakest measurable wind on the scale.

Why Not the Others?

❌ 10–12 km/h: Force 2 (Light Breeze)—leaves rustle.

❌ 18–21 km/h: Force 3 (Gentle Breeze)—small waves form.

Fun Fact: The Beaufort Scale was invented in 1805 by a British admiral to classify winds for sailors! ⛵🌬️

Bonus: Force 0 is "Calm" (0 km/h, smoke rises vertically). 🚬⬆️

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