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The Earth’s radius is 6,371 kilometers. You can use this number to calculate the circumference of the Earth (2 x 3.14 x 6,371 = 40,075 kilometers) or the surface area of the Earth (4 x 3.14 x (6,371^2) = 510,064,362 square kilometers).

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## Is the diameter of the Earth 4000 km?

No, the diameter of the Earth is not 4000 km. In fact, it is about 12,700 km. The reason why some people think that the Earth might have a diameter of 4000 km is because they confuse the diameter of the Earth with the circumference of the Earth. The circumference of the Earth is about 40,000 km, so it’s easy to see how people could make this mistake.

## What is Earth’s radius and mass?

Earth’s radius is about 3,959 miles (6,371 kilometers), and its mass is about 5.974 x 10^24 kilograms, or about 5.974 sextillion metric tons.

## Who calculate the radius of Earth?

Did you know that the radius of Earth is about 3,959 miles? That’s a lot of miles! And who calculated this figure? Well, it was actually first calculated by Greek mathematician Eratosthenes back in the 3rd century BCE. He came up with a pretty clever way of doing it too. He knew that on the summer solstice (the longest day of the year), the sun would be directly overhead at noon at the city of Syene (now called Aswan). He also knew that at the same time, in the city of Alexandria, the sun would be at an angle of 7.2 degrees from vertical. By measuring the shadow cast by a vertical stick in each city, he was able to calculate that the circumference of Earth must be about 25,000 miles. Not bad for someone who lived over 2,000 years ago!

## What is Rs of Earth order of magnitude?

In physics, the Rs of Earth order of magnitude is a unit of length. It is defined as the distance from the center of the Earth to the surface of the Sun. This unit is used to measure large distances, such as the distances between galaxies.

## Frequently Asked Questions (FAQs)

**How fast is the Earth spinning?**

The Earth spins on its axis once every 23.93 hours.

**How far is the end of the world?**

There is no end to the world.

**What is the diameter of Earth in km?**

The diameter of Earth is 12,742 km.

**What is the order of magnitude of 6400 km?**

6400 km is about 6.4 x 10^3 km.

**Is the radius of the earth the same everywhere?**

No, the radius of the Earth is not the same everywhere. The Earth is not a perfect sphere, so its radius varies depending on where you measure it.

**What is the radius of the earth 3671 km?**

3671 km is the average radius of the Earth.

**What is the mass of the Earth in km3?**

The mass of the Earth is 5.97 x 10^24 kg.

**What is the scientific name of the Earth’s radius?**

The scientific name for the Earth’s radius is the equatorial radius.

**What is the gravity of Earth?**

The gravity of Earth is 9.81 m/s^2.

**What is Big G?**

Big G is the gravitational constant. It is the proportionality between the gravitational force and the mass of an object.

**What is 1 Earth radius in kilometers?**

1 Earth radius is 6371 kilometers.

- high-tech-guide.com