Table of Contents
- 1 How did scientists calculate radius and mass of Earth?
- 2 What is the radius of earth in physics?
- 3 What is the radius of earth Class 7?
- 4 How do you calculate the gravity of a planet?
- 5 What is the radius of the earth class?
- 6 How do you find the radius of the Earth?
- 7 How did Al Biruni calculate the radius of the Earth?
How did scientists calculate radius and mass of Earth?
Because we know the radius of the Earth, we can use the Law of Universal Gravitation to calculate the mass of the Earth in terms of the gravitational force on an object (its weight) at the Earth’s surface, using the radius of the Earth as the distance.
What is the radius of earth in physics?
All three values are about 6,371 kilometres (3,959 mi). Other ways to define and measure the Earth radius involve the radius of curvature….
Earth radius | |
---|---|
Metric system | 6,357 to 6,378 km |
English units | 3,950 to 3,963 mi |
What is the radius of earth Class 7?
The radius of the earth is 6371 km.
What unit is radius in physics?
Radian Unit
Radian | |
---|---|
Unit system | SI derived unit |
Unit of | Angle |
Symbol | rad, c or r |
In units | Dimensionless with an arc length equal to the radius, i.e. 1 mm |
How do we measure the Earth?
Earth’s circumference is the distance around Earth. Measured around the Equator, it is 40,075.017 km (24,901.461 mi). Measured around the poles, the circumference is 40,007.863 km (24,859.734 mi). Measurement of Earth’s circumference has been important to navigation since ancient times.
How do you calculate the gravity of a planet?
In the first equation above, g is referred to as the acceleration of gravity. Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2….Calculating g on Other Planets.
Planet | Venus |
---|---|
Radius (m) | 6.073 x 106 |
Mass (kg) | 4.88 x1024 |
g (m/s2) | 8.83 |
What is the radius of the earth class?
The radius of the earth is 6,371 km. Its equatorial radius is 6378 km, but its polar radius is 6357 km – in other words, the Earth is slightly flattened.
How do you find the radius of the Earth?
Compute the radius of the earth using the formula C (circumference) = 2× pi×r (radius). Erastosthenes’ formula would look like this: 39,350= 2×3.14×r, or 6,267 kilometers “For Eratosthen especially, the arc was 7.2 degrees. The distance between location are also part of the total circumference of the earth…
How do you find the circumference of the Earth using X?
Solving for x reveals the circumference of the earth to be 39,350 kilometers. Compute the radius of the earth using the formula C (circumference) = 2 x pi x r (radius). Erastosthenes’ formula would look like this: 39,350 = 2 x 3.14 x r, or 6,267 kilometers.
How did Galileo calculate the size of the Earth?
To get the size of the earth, he multiplied 900 (distance between two points in kilometers) by 50. He got the circumference as 45,000 kilometers. To get the radius of the earth, he divided the earth’s circumference by 2 and pi. Apparently, he arrived at the radius to be 6,617 km.
How did Al Biruni calculate the radius of the Earth?
Al-Biruni’s Classic Experiment: How to Calculate the Radius of the Earth. They started by finding the distance over which the sun’s angle at noon changed by 1 degree, multiply it by 360 and you arrive at the circumference from which size can be deduced. They arrived at a value which was within 4\% of the actual value.