Question 1

What is a cubit?

Accepted Answer

A cubit is an ancient unit based on forearm length, about 18 inches (45.7 cm). Varied by culture: Egyptian royal cubit was 52.4 cm.

Question 2

How long was Noah's Ark in cubits?

Accepted Answer

The Bible gives 300 cubits (about 450 feet or 137 meters). Ancient cubits ranged from 44-52 cm depending on the culture.

Question 3

Is this conversion factor exact?

Accepted Answer

Metric-to-metric conversions are exact (1 km = 1000 m). Imperial-to-metric factors like 1 inch = 2.54 cm are exact by international agreement.

Question 4

Why do some countries use different units?

Accepted Answer

Historical reasons - the metric system spread from France after 1795. The US, UK, and a few others retained older systems. Science uses metric worldwide.

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