What is the radius of Earth in physics?

What is the radius of Earth 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.

How to calculate radius?

1. The radius of a circle from the area: if you know the area A , the radius is r = √(A / π) .
2. The radius of a circle from circumference: if you know the circumference c , the radius is r = c / (2 * π) .

1. The radius of a circle from the area: if you know the area A , the radius is r = √(A / π) .
2. The radius of a circle from circumference: if you know the circumference c , the radius is r = c / (2 * π) .

What is the radius of the earth Class 9?

The radius of the earth is about 6370 km.

What is the formula of area of Earth?

Now as we know that the earth as well as the moon are in the shape of the sphere, So the surface area (S. A)e of the earth = 4πR2 square units, where R is the radius of the earth.

What is the radius of Earth Class 7?

The radius of the earth is 6371 km.

What is the formula for radius in physics?

Radius Formulas
Radius in Terms of Diameter	d ⁄ 2
Radius in Terms of Circumference	C ⁄ 2π
Radius in Terms of Area	√(A ⁄ π)

Radius Formulas
Radius in Terms of Diameter	d ⁄ 2
Radius in Terms of Circumference	C ⁄ 2π
Radius in Terms of Area	√(A ⁄ π)

Is radius a distance formula?

According to the distance formula, this is √(x−0)2+(y−0)2=√x2+y2. A point (x,y) is at a distance r from the origin if and only if √x2+y2=r, or, if we square both sides: x2+y2=r2. This is the equation of the circle of radius r centered at the origin.

What is the formula of radius Class 4?

Radius = Diameter/ 2 when the diameter is given. Radius = Circumference/2π, when the circumference is given. Radius = √( Area/π ), when the area of the circle is given.

What is called radius?

Radius of a circle is the distance from the center of the circle to any point on it’s circumference. It is usually denoted by ‘R’ or ‘r’. This quantity has importance in almost all circle-related formulas. The area and circumference of a circle are also measured in terms of radius. Circumference of circle = 2π (Radius)

What is the formula of radius for Class 7?

When the diameter is known, the formula is Radius = Diameter/ 2. When the circumference is known, the formula is Radius = Circumference/2π. When the area is known, the formula for the radius is Radius = ⎷(Area of the circle/π).

What is the radius of the earth Mcq?

6,371 km is the radius of the earth.

What is a radius Class 9?

The radius of a circle is the length of the line from the centre to any point on its edge. It can also be defined as, the distance from the centre of the circle to any point on the circle is called the radius.

What are the 2 formulas for area?

Figures	Area Formula	Variables
Area of Rectangle	Area = l × w	l = length w = width
Area of Square	Area = a2	a = sides of the square
Area of a Triangle	Area = 1/2 b×h	b = base h = height
Area of a Circle	Area = πr2	r = radius of the circle

Figures	Area Formula	Variables
Area of Rectangle	Area = l × w	l = length w = width
Area of Square	Area = a2	a = sides of the square
Area of a Triangle	Area = 1/2 b×h	b = base h = height
Area of a Circle	Area = πr2	r = radius of the circle

What is the formula of area Class 9?

Shapes	Surface Areas
Cuboid	2(lb + bh + hl)
Cube	6a2
Right Circular Cylinder	2πr(r + h)
Right Circular Cone	πr(l + r), ( l2 = h2 + r2 )

Shapes	Surface Areas
Cuboid	2(lb + bh + hl)
Cube	6a2
Right Circular Cylinder	2πr(r + h)
Right Circular Cone	πr(l + r), ( l2 = h2 + r2 )

What are the basic area formulas?

• Area of a Rectangle = Base × Height.
• Area of a Square = Base × Height.
• Area of a Square = s²
• Area of Triangle = ½(Base × Height)
• Area of Parallelogram = Base × Height.
• Area of Trapezoid = ½(Base₁ + Base₂) × Height.
• Area of Circle = π(radius)² = πr²

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• Area of a Rectangle = Base × Height.
• Area of a Square = Base × Height.
• Area of a Square = s²
• Area of Triangle = ½(Base × Height)
• Area of Parallelogram = Base × Height.
• Area of Trapezoid = ½(Base₁ + Base₂) × Height.
• Area of Circle = π(radius)² = πr²

What is a radius Class 9?

The radius of a circle is the length of the line from the centre to any point on its edge. It can also be defined as, the distance from the centre of the circle to any point on the circle is called the radius.

What is radius of curvature in physics class 9?

In other words, the distance between the pole and centre of curvature of the spherical mirror is called its radius of curvature.

What is the radius of Earth in SI unit?

The Earth’s radius is 6371 km .

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.