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. (e) For that Earth 1/q 289, that is near to the measured inverse flattening 1/f 298. a) The radius of the earth is 4000 miles. The standard English name of the planet, including in science, is Earth. He observed lunar eclipses and noticed that only a round sphere could imply a circular shadow. The Earth's Gaussian radius of curvature at latitude is:[12]. 64miles, whereas, whether it ismeasured round the rods, it isapproximately 24,806 miles. Answered: A space traveler weighs 640 N on Earth. | bartleby Its the only planet with life. {\displaystyle e} What you need is to convert a meter into degrees since long/lat is a polar coordinate system.With the circumference of Earth being 40,075 km, you get 0.00000898315 deg/m which you need to multiply with the size of the object (1 m) to get the degrees which you have to add to your coordinate to get a point which intersects with the radius of . As an example, we will use Eratosthenes situation. What is the radius of Moon? - Heimduo [ Necessary cookies are absolutely essential for the website to function properly. It is a common misconception that Terra is the internationally-recognized scientific name of the planet, but in reality Earth does not have an official international name. The value of the radius is completely dependent upon the latitude in the case of an ellipsoid model, and nearly so on the geoid. c) Calculate the gravitational potential energy associated with a 4.93-kg object at the The first published reference to the Earths size appeared around 350BC, when Aristotle reported in his book On the Heavens(18) that mathematicians had guessed the circumference of the Earth to be 400,000 stadia. Hence 1km=10001000m=10m 6. The physical radius, the distance from the center of the earth to the ellipsoid is the least used. You also have the option to opt-out of these cookies. The cookies is used to store the user consent for the cookies in the category "Necessary". state. Based on data taken by 183 high-school classes taking part in a global Year of Physics project, Appraise the Earth with Shadows, the radius of Earth is 6563 km, when compared to recognized value for that mean radius of 6371 km. This table summarizes the accepted values of the Earth's radius. We also use third-party cookies that help us analyze and understand how you use this website. Tack one end of a piece of string to the top of the stick. You have to find the circumference. What Is The Circumference Of The Earth? - WorldAtlas It has a diameter of 12,756.3 km (Scientific notation: 1.2756 x 10e4) and a radius of 56,378.15 km (Scientific notation: 5.6378 x 10e4 km.) A closed-form solution exists for a spheroid:[14]. Not all deformations originate within the Earth. The mathematical expressions above apply over the top of ellipsoid. Also, explore tools to convert Earths equatorial radius or meter to other length units or learn more about length conversions. On solving the circumference of the earth we get 39,350 kilometres. , Does Wittenberg have a strong Pre-Health professions program? (a) To what radius (in meters) would the earth have to be compressed in order for it to become a black holethe escape velocity from its surface equal to the velocity c = 3 \times 10 ^ { 8 } \mathrm { m } / \mathrm { s } c = 3108m/s of light? = This is the radius that Eratosthenes measured in his arc measurement. Compute the radius of the Earth using the formula C (circumference) = 2 x pi x r (radius). Scholars have interpreted Aristotle's figure to be anywhere from highly accurate[20] to almost double the true value. In scientific notation, the radius of the earth in meters is equal to 6.37106 meters or approximately 6.4106 meters, and 6378100 or approximately 6370000 in standard form. {\displaystyle F=f=0} The actual radius of the earth is 6,378.1 kilometers at the equator, but the radius varies because the earth is a somewhat flattened sphere. But opting out of some of these cookies may affect your browsing experience. 903 mi) at the poles and 6371. With , For the Earth, the authalic radius is 6,371.0072km (3,958.7603mi). Created by Sal Khan and Monterey Institute for Technology and Education. Exercises. Let the mass of the earth be M and radius of the earth be R, The distance of the body from the center of the earth will also be equal to the radius R of the earth. What is the radius of Earth in meters? | Homework.Study.com However, Earth is not quite a sphere. By 1490, Christopher Colombus believed that traveling 3,000 miles west from the west coast of the Iberian peninsula would let him reach the eastern coasts of Asia. The first published reference to the Earth's size appeared around 350BC, when Aristotle reported in his book On the Heavens[19] that mathematicians had guessed the circumference of the Earth to be 400,000 stadia. The radius is more like 6,371 kilometers at the north and south poles. \text{Circumference} = 39,350 \text{\ kilometers}. Calculating Earths Volume Averaging these two numbers yields a mean radius of 6,371.0 kilometers (3,958.7 miles), which in turn yields an approximate value for the volume of the Earth of 1.08 quadrillion cubic kilometers (259 trillion cubic miles). r For information on the Earth, see the Earth Fact Sheet. = z The various radii derived here use the notation and dimensions noted above for the Earth as derived from the WGS-84 ellipsoid;[6] namely. The planet's rotation causes it to bulge at the equator. This cookie is set by GDPR Cookie Consent plugin. In a geocentric ellipsoid, the center of the ellipsoid coincides with some computed center of Earth, and best models the earth as a whole. earthRadius R More than 2,000 years ago Eratosthenes compared the position of the Suns rays in two locations to calculate the spherical size of the Earth with reasonable accuracy. 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. in the second fundamental form for a surface (Equation (123) in[11]): e, f, and g are elements of the shape tensor: n Earth's volume is estimated at 1 trillion cubic kilometers. What is the Circumference of the Earth? Calculation, Examples {\displaystyle {\frac {\partial r}{\partial \lambda }}} , For Earth, the volumetric radius equals 6,371. The bulge have been decreasing, consider 1998 the bulge has elevated, possibly because of redistribution of sea mass via currents. w {\displaystyle R_{2}} Sun: radius = 696,000 kilometers, 100 times larger. The answer would be 695 500 000 m. Wiki User. Most experts think planet Earth can support about 10 billion people, and that when our population reaches that number, it will start to decline. 2 This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. 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. According to NASA's Goddard Space Flight Center, Earth's radius at the equator is 3,963 miles (6,378 kilometers). [a] Local topography increases the variance, resulting in a surface of profound complexity. Examples collapse all Earth Radius in Meters View the mean radius of the Earth using the default units, meters. How to convert latitude or longitude to meters? - Stack Overflow Earth Radius by Latitude Calculator - Rechneronline - Ntzliche Rechner y These cookies will be stored in your browser only with your consent. m. The recent Juno mission launched with the goal of examining Jupiters composition and underlying structure, the wikipedia article on the Juno spacecraft provides an a great overview of this type of process. Then convert km - m. 1 km = 1000 m. 12 756 km = ? This website uses cookies to improve your experience while you navigate through the website. "The Earth's mass is about 5.98 10 24 kg". Therefore, the difference was 7.2 degrees. Both of these values are very close to the accepted modern values for the Earths circumference and radius, 40,070 km and 6378 km respectively, which have since been measured by orbiting spacecraft. example R = earthRadius (lengthUnit) returns the mean radius of the Earth using the length unit specified by lengthUnit. Surface Gravity Metric: 9.80665 m/s 2 English: 32.041 ft/s 2 Escape Velocity Metric: 40,284 km/h English: 25,031 mph Scientific Notation: 1.119 x 10 4 m/s Sidereal Rotation Period 0.99726968 Earth Days 23.934 Hours Surface Temperature Metric: -88/58 (min/max) C English: -126/136 (min/max) F Scientific Notation: 185/331 (min/max) K {\displaystyle K} The following radii are derived from the World Geodetic System 1984 (WGS-84) reference ellipsoid. The equatorial circumference is simply the circle perimeter: Ce=2a, in terms of the equatorial radius, a. As the parallels run east and west, places having the same latitude will be due east or due west of each other. Obviously, nobody is claiming how big Earth has really altered. The cookie is used to store the user consent for the cookies in the category "Performance". What is the real radius of the earth? - TeachersCollegesj
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