Convert span (cloth) to Earth's polar radius
Please provide values below to convert span (cloth) [span] to Earth's polar radius [R_p], or Convert Earth's polar radius to span (cloth).
How to Convert Span (Cloth) to Earth's Polar Radius
1 span = 3.59617599068631e-08 R_p
Example: convert 15 span to R_p:
15 span = 15 × 3.59617599068631e-08 R_p = 5.39426398602947e-07 R_p
Span (Cloth) to Earth's Polar Radius Conversion Table
| span (cloth) | Earth's polar radius |
|---|
Span (Cloth)
A span is an obsolete unit of length, typically about 9 inches, based on the distance between the tip of the thumb and the tip of the little finger when the hand is fully extended.
History/Origin
The span has been used as a unit of measurement for thousands of years in many different cultures.
Current Use
The span is no longer a standard unit of measurement.
Earth's Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole, approximately 6,356.8 kilometers.
History/Origin
The fact that the Earth is an oblate spheroid, flattened at the poles, has been known since the 18th century. Modern measurements are made with high precision.
Current Use
The Earth's polar radius is a key parameter in geodesy and is used to define the Earth's shape and gravitational field.