what is the radius of the earth in meters

Have your partner do the same in her location at the exact same time. The radius of the swimming pool water atom is roughly meters. Video advice: How Eratosthenes discovered the radius of the earth. Go farther. for the nominal polar Jupiter radius. All other parallels of latitude are small circles, each having a radius smaller than that of the earth, i.e. The dashed line designates the radius to one point on the surface. Keplers Third law can be used to determine the orbital radius of the planet if the mass of the orbiting star is known (R3=T2Mstar/Msun, the radius is in AU and the period is in earth years). A sphere being a gross approximation of the spheroid, which itself is an approximation of the geoid, units are given here in kilometers rather than the millimeter resolution appropriate for geodesy. r This website uses cookies to improve your experience while you navigate through the website. We invite readers to visit us daily, explore topics of interest, and gain new perspectives along the way. {\displaystyle {\mathcal {R}}_{\mathrm {eE} }^{\mathrm {N} }} Radio Line of Sight Distance Calculator Electrical, RF and Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Radius refers to a line that connects to the centre point of a circle to any point on its outside layer. It is possible to combine the principal radii of curvature above in a non-directional manner. Ans. See the formula used in an example where we are given the diameter of the sphere. Measuring the Circumference of the Earth. Analytical cookies are used to understand how visitors interact with the website. => When indoor location is available, the accuracy range can be as small as 5 meters. However, Earth is not quite a sphere. | What is the radius of the earth in meters in scientific notation? What is the Radius and Diameter of a Circle? 3.2.2.2Non-directional 4Global radii 4.1Nominal radius 4.2Arithmetic mean radius 4.3Authalic radius 4.4Volumetric radius 4.5Rectifying radius 5Topographical radii 5.1Topographical extremes 5.2Topographical global mean 6Derived quantities: diameter, circumference, arc-length, area, volume 7Published values 8History 9See also 10Notes 11References The cases below considers Earth's topography, above or below a reference ellipsoid. How Big Is Planet Earth? - WorldAtlas A meter is a meter, no matter what your zoom level is. where e2 = a2 b2/a2 and A is the surface area of the spheroid. This cookie is set by GDPR Cookie Consent plugin. Answer (1 of 3): First of all let us consider the shape of the earth to be a sphere. Now we know 1km=1000m 5. The distance between Syene and Alexandria is 787 kilometers, Eratosthenes used the ancient Greek measurement of stadia, but his calculations use the proportionality of angles between two locations, so any system of measurement will work. r = 39350/ 6.28 = 6267 kilometer. Length in km of 1 of latitude = always 111.32 km Length in km of 1 of longitude = 40075 km * cos ( latitude ) / 360 Share Follow edited Jul 21, 2022 at 14:03 answered Sep 16, 2016 at 21:29 We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Last edited on 10 February 2023, at 21:43, International Union of Geodesy and Geophysics, IAU 2006 General Assembly: Result of the IAU Resolution votes, Satellites Reveal A Mystery Of Large Change In Earth's Gravity Field, NASA's Grace Finds Greenland Melting Faster, 'Sees' Sumatra Quake, "Discover-TheWorld.com Guam POINTS OF INTEREST Don't Miss Mariana Trench", "Mean radius, mass, and inertia for reference Earth models", https://en.wikipedia.org/w/index.php?title=Earth_radius&oldid=1138658294, WGS-84 ellipsoid, polar radius of curvature (, WGS-84 ellipsoid, Mean radius of semi-axes (, WGS-84 ellipsoid, Radius of Sphere of Equal Area (, WGS-84 ellipsoid, Radius of Sphere of Equal Volume (, meridional radius of curvature at the equator, This page was last edited on 10 February 2023, at 21:43. It is the only planet in our solar system that sustains life and it is the planet that we can call our own. {\displaystyle {\mathcal {R}}_{\mathrm {pJ} }^{\mathrm {N} }} nasa.gov. Using the Gauss-Bonnet theorem, this gives, Another spherical model is defined by the Earth's volumetric radius, which is the radius of a sphere of volume equal to the ellipsoid. So escape velocity = . What is the radius of Earth in exponential form? Convert the Earth-Sun distance of 93,000,000 miles into. An international crew of seven people live and work while traveling at a speed of five miles per second, orbiting Earth about every 90 minutes. ), In geophysics, the International Union of Geodesy and Geophysics (IUGG) defines the Earth's arithmetic mean radius (denoted R1) to be[2], The factor of two accounts for the biaxial symmetry in Earth's spheroid, a specialization of triaxial ellipsoid. Make sure both sticks are perpendicular to the earth and that the same length of stick protrudes from the ground. This measurement also introduces another fun source of error that actually comes from the motion of Earth and other similar planetary bodies in the solar system. The structure of the Earths upper mantle can be derived from seismic waves. Sun: radius = 696,000 kilometers, 100 times larger. Solution for the radious of earth is 6378.1 km, which is 2981.1 km greater than the radius of mars. The Earths circumference is approximately 40,000,000 meters. r [clarification needed]. As satellite remote sensing and especially the Global Positioning System gained importance, true global models were developed which, while not as accurate for regional work, best approximate the Earth as a whole. The nominal radius serves as a unit of length for astronomy. The model is rotated in a wind tunnel at a rotational speed of 500 rev/minrev/min. Andrew Blum gives some tips that could students in the high-school class in Clinton, Mississippi because they focus on the Eratosthenes project. The radius of Earth at the equator is 3,963 miles (6,378 kilometers), according to NASA's Goddard Space Flight Center in Greenbelt, Maryland. arrow_forward. Oceanic crust is denser and thinner and mainly composed of basalt. The radius of the earth's orbit is 45,000,000 meters. 2 b) Calculate the surface free-fall acceleration. R=6370 3. , and because The Earth's meridional radius of curvature at the equator equals the meridian's semi-latus rectum: The Earth's prime-vertical radius of curvature at the equator equals the equatorial radius, N = a. Our descriptions of Earths surface must be simpler than reality in order to be tractable. He studied in Athens at the Lyceum. According to Newtons second law of motion, the acceleration of an object equals the net force acting on it divided by its mass, or a = F m . How fast is the earth moving? - Scientific American Earths rotation, internal density variations, and external tidal forces cause its shape to deviate systematically from a perfect sphere. [7] Additional discrepancies caused by topographical variation at specific locations can be significant. Rotation of a planet causes it to approximate an oblate ellipsoid/spheroid with a bulge at the equator and flattening at the North and South Poles, so that the equatorial radius a is larger than the polar radius b by approximately aq. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. The planet's rotation causes it to bulge at the equator. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Keplers Third law can be used to determine the orbital radius of the planet if the mass of the orbiting star is known (R3=T2Mstar/Msun, the radius is in AU and the period is in earth years). , Does Wittenberg have a strong Pre-Health professions program? 2a : the bone on the thumb side of the human forearm also : a corresponding part of vertebrates above fishes. How do you express the earths diameter in scientific notation? Circumference of the Earth in Meters Q. What is the radius of the Moon around the Earth? are tangents to the surface. {\displaystyle p=N\cos(\varphi )} What is the radius of the parallel of latitude? The distance to the centre of the Earth has been taken as the volumetric mean radius of the Earth: 6,371km. Since the estimate by Eratosthenes, many models have been created. Subtract the angle measurements to determine the difference in the angle of shadows between the two locations. How do you find the radius of the earth from the circumference? cos Radius of planet R = 2 x radius of earth = 2 x 6.4 x 10 6 m. G = gravitational constant = 6.67 x 10-11 N m 2 /kg 2. The equatorial radius is most commonly used to calculate the volume of Earth, so as not to leave out any territory. Arc length of more general surface curves, such as meridian arcs and geodesics, can also be derived from Earth's equatorial and polar radii. Surveyors today use a variety of instruments and calculations to determine the size of the Earth and collect other relevant data. Do NOT follow this link or you will be banned from the site! 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. The circumference of the Earth can be calculated using the formula, Circumference = 2 R or D, where R is the radius of Earth and D is the diameter. What is radius of Earth in gravitation Class 9? 903 mi) at the poles and 6371. In his writing, Alexander covers a wide range of topics, from cutting-edge medical research and technology to environmental science and space exploration.

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