Convert inch to Earth's polar radius
Please provide values below to convert inch [in] to Earth's polar radius [R_p], or Convert Earth's polar radius to inch.
How to Convert Inch to Earth's Polar Radius
1 in = 3.99575110076257e-09 R_p
Example: convert 15 in to R_p:
15 in = 15 × 3.99575110076257e-09 R_p = 5.99362665114386e-08 R_p
Inch to Earth's Polar Radius Conversion Table
| inch | Earth's polar radius |
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Inch
An inch is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.
History/Origin
The term "inch" was derived from the Latin unit "uncia" which was equivalent to "one-twelfth" of a Roman foot. The inch has had various standards throughout history, with the current definition being based on the international yard.
Current Use
The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens.
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.