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Anonymous users2024-02-06This is because of the centrifugal force of the earth's rotation.
The earth is spinning, so centrifugal force is generated. The magnitude of the centrifugal force of the rotating object is proportional to the radius of rotation, and the closer it is to the axis of rotation, the smaller the centrifugal force; The farther away from the axis of rotation, the greater the centrifugal force.
The equatorial part of the earth is the farthest from the axis of rotation, so the centrifugal force is the largest, while the polar part is closest to the axis of rotation, so the centrifugal force is the smallest; To the two poles, the distance from the axis of rotation is zero, and the centrifugal force is also zero.
Under the action of the centrifugal force of the earth's rotation, the equatorial part of the earth will be slightly convex, and the pole part will shrink a little inward. As a result, the Earth's equatorial radius would be greater than the polar radius.
The average radius of the earth is the arithmetic mean of the equatorial radius and the polar radius, so the average radius will be greater than the polar radius and less than the equatorial radius.
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Anonymous users2024-02-05Because the earth is an irregular sphere with flat poles and equatorial drums, that is, the diameter of the poles is shorter than the diameter of the equator, so the distance between the two radies is also that the radius of the poles is shorter than the radius of the equator. The average radius is the average of the radius of this irregular sphere of the entire Earth, while the equatorial radius is the longest, and the longest is definitely larger than the average.
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Anonymous users2024-02-04The radius of the poles is 6,357 kilometers, and the radius of the equator is 6,378 kilometers, a difference of 21 kilometers.
The average radius of the Earth is 6371 km), so some people call the Earth"Pear-shaped earth", very vivid.
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Anonymous users2024-02-03Equatorial radius (about 13 miles, about 21 kilometers, longer than the polar radius).
Earth's radius refers to the distance from the center of the Earth to its surface (mean sea level).
The Earth is not a regular object. First of all, it is not a positive sphere, but an ellipsoid, to be precise, an oblate sphere with slightly flattened poles and slightly bulging equators; Secondly, the north pole and north pole of the earth are also asymmetrical, in terms of sea level, the north pole is slightly convex, and the south pole is slightly concave; Third, the Earth's external topography is undulating (which has an impact on measuring the Earth's half-stuffy trouser diameter). The average is about 3959 miles (km).
Polar radius
The distance from the center of the earth to the north or south pole,Approximately 3950 miles (km).(The difference between the two poles is so small that it can be ignored).
Equatorial radius
is the distance from the center of the earth to the equatorApproximately 3963 miles (km).
Average radius. It is about 3959 miles (km) of hooded ants. This number is the average of the distances from the center of the earth to all points on the surface of the earth.
It can be found as follows: mean radius = (equatorial radius 2 + polar radius) 3
Earth's radius is sometimes used as a unit of distance, especially in astronomy and geology. It is usually denoted by re.
The radius of the Earth is about kilometers.
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Anonymous users2024-02-02Common values for the various radii of the earth are as follows:
1. Radius of the Earth's poles: The distance from the center of the earth to the North or South Pole is about 3,950 miles, that is, kilometers.
2. Earth's equatorial radius: It is the distance from the center of the earth to the equator, about 3963 miles, that is, kilometers.
3. The average radius of the earth: about 3,959 miles, that is, kilometers. The average of the Earth's semi-forest trail is the average of the distance from the center of the earth to all points on the earth's surface.
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Anonymous users2024-02-01Pole radius length: 6,356 km.
Radius length of the red nucleus cryptopathic Brycephalous nucleus: 6,378 km.
The Earth's equatorial radius is 22 kilometers longer than the polar radius.
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Anonymous users2024-01-31Pole Radius: The distance from the center of the earth to the North Pole or the South Pole, about kilometers.
Equatorial semi-barrage belt diameter: The distance from the center of the earth to the equator, about kilometers.
Of course, the Earth is bigger, and the radius of the Moon is twice the radius of the Earth, that is, about 1,740 kilometers.
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