How many km radius is the earth?

How many km radius is the earth?

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.

Is the Earth 40000 km?

In 200 B.C. Eratosthenes estimated Earth’s circumference at about 46,250 kilometers (28,735 miles). Today we know our planet’s circumference is roughly 40,000 kilometers (24,850 miles).

What is Earth’s radius Class 11?

The radius of the earth is about 6370 Km.

Is the diameter of the Earth 4000 km?

Its diameter (the distance from one side to the other through Earth’s center) is 7,926 miles (about 12,756 kilometers).

What is Earth’s radius Class 9?

The radius of the earth is about 6370 km.

What is the radius of Earth Class 7?

The radius of the earth is 6371 km.

How old is Earth?

Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date. In northwestern Canada, they discovered rocks about 4.03 billion years old.

How thick is Earth?

Earth’s crust varies in thickness from 35 to 70 kilometers (22 to 44 miles) in the continents and 5 to 10 kilometers (3 to 6 miles) in the ocean basins.

At what speed is Earth?

As schoolchildren, we learn that the earth is moving about our sun in a very nearly circular orbit. It covers this route at a speed of nearly 30 kilometers per second, or 67,000 miles per hour.

Who discovered Earth’s radius?

The first person to determine the size of Earth was Eratosthenes of Cyrene, who produced a surprisingly good measurement using a simple scheme that combined geometrical calculations with physical observations. Eratosthenes was born around 276 B.C., which is now Shahhat, Libya. He studied in Athens at the Lyceum.

How heavy is the Earth?

What is the radius of the earth Mcq?

6,371 km is the radius of the earth.

What is Earth made of?

Earth is composed of four main layers, starting with an inner core at the planet’s center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1,221 kilometers) in radius.

What layer of the Earth is 5000 km?

Inner core (5000 km – 6370 km below the Earth’s surface). 2 % of the Earth’s total mass.

How round is the Earth?

The Earth is an irregularly shaped ellipsoid. While the Earth appears to be round when viewed from the vantage point of space, it is actually closer to an ellipsoid. However, even an ellipsoid does not adequately describe the Earth’s unique and ever-changing shape.

What is a radius Class 10?

A radius is a measure of distance from the center of any circular object to its outermost edge or boundary.

What is radius of a circle Class 7?

Note: Circle is a closed 2D figure in which all points are at equal distance from a fixed point called center and this distance is called radius.

What is called radius?

: a line segment extending from the center of a circle or sphere to the circumference or bounding surface.

Is the radius of the earth is 6371 km?

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).

Is the radius of Earth is 6400 km?

The mass of the Earth is about 10 times the mass of Mars. If an object weighs 200 N on the surface of Earth, its weight on the surface of Mars will be.

Is the Earth 13000 km?

As a result, the latest measurements indicate that the Earth has an equatorial diameter of 12,756 km (7926 mi), and a polar diameter of 12713.6 km (7899.86 mi).

How fast is Earth in KM?

Earth’s orbital speed averages 29.78 km/s (107,208 km/h; 66,616 mph), which is fast enough to cover the planet’s diameter in 7 minutes and the distance to the Moon in 4 hours.