Radius of earth

  1. 3.1: Orbital Mechanics
  2. How to Find the Radius of the Earth?
  3. Horizon
  4. How much does planet Earth weigh?


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3.1: Orbital Mechanics

\( \newcommand = Constant \] Below we will see that this constant is related to Newton's Law of Universal Gravitation, and therefore can also give us information about the mass of the object being orbited. But first, let's see how one can use Kepler's third law to for two applications. Orbital Period or Radius of a Satellite or other Object Consider two planets (1 and 2) orbiting the sun. If the proportionality above it true for each planet, then we can set the fractions equal to each other, and rearrange to find, \[\frac \), the radius is in AU and the period is in earth years). The Fastest Path from one Planet to Another Kepler's 3rd law can also be used to determine the fast path (orbit) from one planet to another. This fastest path is called a Hohmann transfer orbit, named for the german scientist Walter Hohmann who first published the orbit in 1952 (see more in this article). In the above discussion of Kepler's Law we referred to \(R\) as the orbital radius. In fact, because almost no planet, satellite, or moon is actually on a perfectly circular orbit \(R\) is the semi-major axis of the elliptical path of the orbiting object. For the Hohmann Transfer orbit, we need to be more explicit about treating the orbits as elliptical. Take for example Mars orbiting the Sun. The Sun is not located at the center of the ellipse, but slightly to one side (at one of the two foci of the ellipse). Mars is closest to the Sun at Perihelion and farthest away at Aphelion. Figure \(\PageI...

How to Find the Radius of the Earth?

1.5 Solved Question for You The Radius of the Earth If we talk about the earth then we can say that Earth is the nearly spherical ball and the only known planet of the solar system on which life exists. In addition, Earth is not completely round and it’s in the shape of an orange. In this topic, we are going to discuss the various things that help us to find the radius of the earth. What is Earth? The Earth is the third planet of our Besides, the distance between the sun and the earth is also a factor that supports life on earth. What is the Radius of the Earth? Radius refers to a line that connects to the centre point of a circle to any point on its outside layer. In simple words, radius refers to that line, which originates from any point of the circle and touches the centre point the circle. Most noteworthy, if we double the radius (the diameter of the circle) then it divides the circle into two equal halves. Also, the diameter is the maximum distance between the two points of the circle. What Does the Earth Look Like? If we talk about the appearance of the In addition, the blue area is water (oceans and seas), the white whirls are clouds and yellow, brown, and green are landforms. Besides, the white area is the snow caps or north and south poles (Antarctica and Arctic). Also, the equator is the imaginary line that divides the earth into two equal halves. Furthermore, the southern half of the planet is Southern Hemisphere and the north half is the Northern Hemisphere. M...

Horizon

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How much does planet Earth weigh?

Digital Vision/ It would be more proper to ask, "What is the 1 The quick answer to that is approximately 6,000,000, 000,000,000,000,000,000 (6 x 10 24) kilograms. The interesting sub-question is, "How did anyone figure that out?" It's not like the planet steps onto the gravitational attraction that the It turns out that any two masses have a gravitational attraction for one another. If you put two bowling balls near each other, they will attract one another gravitationally. The attraction is extremely slight, but if your instruments are sensitive enough you can measure the gravitational attraction that two bowling balls have on one another. From that measurement, you could determine the mass of the two objects. The same is true for two golf balls, but the attraction is even slighter because the amount of gravitational force depends on mass of the objects. Newton showed that, for spherical objects, you can make the simplifying assumption that all of the object's mass is concentrated at the center of the sphere. The following equation expresses the gravitational attraction that two spherical objects have on one another: F = G(M1*M2/R 2) • F is the force of attraction between them. • G is a constant that is 6.67259 x 10 -11 m 3/kg s 2. • M1 and M2 are the two masses that are attracting each other. • R is the distance separating the two objects. Assume that Earth is one of the masses (M1) and a 1-kg sphere is the other (M2). The force between them is 9.8 kg*m/s 2 -- we can cal...