What is the real radius of Earth?

The value, symbolized rearth, is equal to approximately 6,371,000 meters (6.371 x 106 m). This is roughly 6,371 kilometers (km) or 3,960 statute miles. The Earth is slightly oblate, so its radius in the plane of the equator is a little larger than its radius along the rotational axis.

What is the smallest radius of Earth?

Regardless of the model, any radius falls between the polar minimum of about 6,357 km and the equatorial maximum of about 6,378 km (3,950 to 3,963 mi).

What is the radius of the earth 2021?

3,963 miles
The radius of Earth at the equator is 3,963 miles (6,378 kilometers), according to NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

How many km2 is the Earth?

196.9 million mi²Earth / Surface area

Who calculated radius of Earth?

Eratosthenes
During the 3 century, B.C. Eratosthenes was able to mathematically calculate the diameter of the earth by comparing the difference in the angle of the sun’s rays at different geographic points. He was the first person that was able to calculate the radius of the earth.

Which has smallest radius?

Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus.

Which country is heart of Earth?

In 1973, Andrew J. Woods, a physicist with Gulf Energy and Environmental Systems in San Diego, California, used a digital global map and calculated the coordinates on a mainframe system as 39°00′N 34°00′E, in modern-day Turkey, near the district of Kırşehir, Kırşehir Province, approx. 1,800 km north of Giza.

How is Earth radius measured?

For measuring the radius of the earth compute the circumference of the earth. Do this by taking the example of Eratosthenes and find the distance and angle between two locations. Since the distance between the two locations can be an arc measurement of the 360-degree circle.

What is Earth’s radius in physics?

According to data taken by 183 high-school classes participating in a World Year of Physics project, “Measure the Earth with Shadows”, the radius of Earth is 6563 km, compared to the accepted value for the mean radius of 6371 km.

Which has largest atomic size?

Smallest and Largest Atomic Radius Francium has the largest atomic size on the periodic table, and helium has the smallest atomic size.

Which place is Centre of world?

The place where French scientist Charles-Marie de La Condamine determined the (more or less) precise location of the Equator, is now marked by a large monument: La Mitad del Mundo, the centre of the world.

What is the radius of the Earth?

) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid, the radius ranges from a maximum of nearly 6,378 km (3,963 mi) ( equatorial radius, denoted a) to a minimum of nearly 6,357 km (3,950 mi) ( polar radius, denoted b ).

How do you find the radius of curvature of the Earth?

If one point had appeared due east of the other, one finds the approximate curvature in the east–west direction. This Earth’s prime-vertical radius of curvature, also called the Earth’s transverse radius of curvature, is defined perpendicular ( orthogonal) to M at geodetic latitude φ is:

What is the radius of the Earth’s polar axis?

The Earth’s polar radius b, or semi-minor axis, is the distance from its center to the North and South Poles, and equals 6,356.7523 km (3,949.9028 mi). Three different radii as a function of Earth’s latitude.

What is the diameter of the Earth at the equator?

Radius, diameter and circumference. The radius of Earth at the equator is 3,963 miles (6,378 kilometers), according to NASA’s Goddard Space Flight Center. However, Earth is not quite a sphere. The planet’s rotation causes it to bulge at the equator.