Webस How are the radius of curvature and focal length of a spherical mirror related? m (b) What is its power in diopters? ϰ How is the power of a mirror related to the focal length? D In 2013 the comet PanSTARRS was seen moving across our sky at approximately 0.7 degrees per day, when it was 1.3 × 1 0 8 km away from Earth. How fast was it ... Using the Gauss-Bonnet theorem, this gives. ∫KdAA=4πA=1R22.{\displaystyle {\frac {\int K\,dA}{A}}={\frac {4\pi }{A}}={\frac {1}{R_{2}^{2}}}.} Volumetric radius[edit] Another spherical model is defined by the Earth's volumetric radius, which is the radius of a sphere of volume equal to the ellipsoid. See more Earth radius (denoted as R🜨 or $${\displaystyle R_{E}}$$) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid, the radius ranges from a … See more Geocentric radius The geocentric radius is the distance from the Earth's center to a point on the spheroid surface at geodetic latitude φ: See more The mathematical expressions above apply over the surface of the ellipsoid. The cases below considers Earth's topography, above or below a reference ellipsoid. As such, they are topographical geocentric distances, Rt, which depends not only on latitude. See more Earth's rotation, internal density variations, and external tidal forces cause its shape to deviate systematically from a perfect sphere. Local See more The following radii are derived from the World Geodetic System 1984 (WGS-84) reference ellipsoid. It is an idealized surface, and the Earth measurements used to calculate it … See more The Earth can be modeled as a sphere in many ways. This section describes the common ways. The various radii derived here use the … See more Earth's diameter is simply twice Earth's radius; for example, equatorial diameter (2a) and polar diameter (2b). For the WGS84 ellipsoid, that's respectively: • 2a … See more
Horizon - Wikipedia
WebAug 30, 2014 · What is the real radius of earth? Google says 6378.1 km; Wiki says 6371 km; And there are references for 6378.7 km; I'm using maximum radius 6378.7 km in distance … Web63 rows · an object of diameter 725.27 km at a distance of 1 astronomical unit (AU) an object of diameter 45 866 916 km at 1 light-year an object of diameter 1 AU (149 597 871 … matthew buchanan marketing
13.4 Satellite Orbits and Energy - OpenStax
WebPlanet: a spherical object that orbits a star; dominates its orbit; reflects light; rock, ice, gas 8 in our solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune Earth radius: 6370 km, age: 4 billion years, spins at 1670 km/hr Jupiter radius: 71 000 km Moon: a natural satellite of a planet Moon radius: 1700 km (5th largest ... WebSince the ISS orbits 4.00 × 10 2 km above Earth’s surface, the radius at which it orbits is R E + 4.00 × 10 2 km. We use Equation 13.7 and Equation 13.8 to find the orbital speed and … http://wiki.gis.com/wiki/index.php/Spherical_Earth matthew b sullivan