The diameter of the Earth at the equator is 7926.68 miles (or 12756.75 km). Measurements of a lake’s width were taken at 15-foot intervals, as shown: x= 0 15 30 45 60 75 90 105 … (We have R= 28×52, ... this will correspond to r= 0.01 above, its approximate circumference will be around 400 km and its area approximately 12000 km2. The earth is an approximate sphere. Many astronomical and navigational computations use it as a surface representing the Earth. A spheroid is simply an ellipsoid that approximates a sphere. Comment . Top Users +116129 CPhill moderator +112580 Melody moderator +31722 Alan … The earth's shape is an ellipsoid. This is the case for the Earth-Moon system, in which the barycenter is located on average 4,671 km (2,902 mi) from Earth's center, 75% of Earth's radius of 6,378 km (3,963 mi). 2.The diagrams below represent photographs of a large sailboat … These examples are two common world spheroids used today with their values rounded to the nearest meter. (b) will have the same value everywhere but not directed towards the centre. People who have traveled by air or solely checked flight routes have probably noticed that flights don’t follow a … The radius of Earth is 6.38 X 10^6 m. This force is zero at the poles and greatest at the equator, resulting in a slightly squashed appearance for the body. Our question says that the approximate radius of the earth is 6.37 temps tend to the six meters and assuming that the earth is a spirit, wants us to find a the circumference and kilometers be its surface area and kilometers squared and see its volume in kilometers. The earth's shape is a spheroid. Our descriptions of Earth's surface must be simpler than reality in order to be tractable. If the Earth was substantially displaced from the center, this division into visible and … They have a fairly interesting map of the Earth as well. $\endgroup$ – Gaialogist Apr 29 '14 at 17:07 As the centuries passed, scientists and explorers began to realize that the earth was not a perfect sphere. If the interior contained matter which is not of the same density everywhere, then on the surface of the earth, the acceleration due to gravity(a) will be directed towards the centre but not the same everywhere(b) will have the same value everywhere but not directed towards the centre(c) will be same everywhere in magnitude directed towards the centre(d) cannot be zero at … A)The change in density of the atmosphere is causing refraction of light rays. Add a Comment Solutions 0. The great … Approximation is also used to analyze the motion of several planets orbiting a star. Use the equation for the volume of a sphere which is V = 4/3 x Radius 3 The mean radius of the earth is approximately 6.4 million meters (exact = 6.37 x 10 6 m). The inner radius is a = 14.6 cm and the outer radius is b = 43.8 cm. Earth's rotation, internal density variations, and external tidal forces cause its shape to deviate systematically from a perfect sphere. The Earth's surface, and two reference surfaces used to approximate it: the Geoid, and a reference ellipsoid.The deviation between the Geoid and a reference ellipsoid is called … In 28 , it is proven that, in a similar problem setting (the model of 28 considers that a link is hit by a disaster exactly if at least one of its endpoints is inside the disaster region. - Physics. The … 6371 km is not the mean radius of the Earth, it's as I wrote the radius of “a spherical Earth of equal volume”. Its volume is then: (4/3) x 3.14 x 6400000 3 m 3 This comes to 1,097,509,500,000,000,000,000 cubic meters. Also no effort is made to answer the question. from the Earth’s … … Physics. The Earth's magnetic field at the Equator is approximately 0.4 G. Estimate the Earth's magnetic dipole moment. A great circle (also orthodrome) of a sphere is the largest circle that can be drawn on any given sphere. Advertisement Remove all ads. Earth turns on its axis approximately once every 24 hours. Consequently, two main reference surfaces have been established to approximate the shape of the Earth. Great circle distance isn’t a new concept; in fact, many of you have already seen it in action. earth. Assume the Earth is approximately a sphere (not and elllipsoid). A geoid is the equipotential surface of the Earth's gravity field; put simply, it has the shape of a lumpy, slightly squashed ball. $\endgroup$ – sammy … 54 Online Users. 1.Which sphere of earth covers approximately 70% of Earth's surface? The earth is an approximate sphere. 8.1 The earth is an approximate sphere. Closer approximations range from modeling the shape of the entire Earth as … A sphere being a gross approximation of the spheroid, which itself is an approximation … It is formed by the intersection of a plane and the sphere through the center point of the sphere. radius of the earth is 6400. and also the formula is 4/3 pi r^3 to find the volume of the sphere. Somewhere it should derive the fact that outer shells exert … The average height of this is usually given as 11 km., but this varies over the earth. Ptolemy argued that the Earth was a sphere in the center of the universe, from the simple observation that half the stars were above the horizon and half were below the horizon at any time (stars on rotating stellar sphere), and the assumption that the stars were all at some modest distance from the center of the universe. Approximate the earth as a uniform sphere. Between the troposphere and the stratosphere is the tropopause which marks the approximate upper limit of mixing in the lower atmosphere. 2 $\begingroup$-1. If the interior contained matter which is not of the same density everywhere, then on the surface of the earth, the acceleration due to gravity (a) will be directed towards the centre but not the same everywhere (b) will have the same value everywhere but not directed towards the centre (c) will be same everywhere in magnitude directed towards the centre (d) cannot be zero at … Post New Answer . (d) cannot be zero at … However, the Earth is an approximate sphere, and the shortest distance between two points on the surface of a sphere is an arc known as ‘the great circle distance’. The French, using their own local measurements, believed the earth to be squished at the … There are several reasonable ways to approximate Earth's shape as a sphere. Volume of a sphere formula. D)The sailboat is moving around the curved surface of Earth. As the science of geodesy measured Earth more accurately, the shape of the geoid was first found not to be a perfect sphere but to approximate an oblate spheroid, a specific type of ellipsoid. For many purposes, we can ignore the variation from a sphere; but, if accuracy matters, the Earth is best described as a geoid. Let m2 = mass of entire earth (of radius r1) Let m3 = mass of earth (of radius r2) Look up in your physics book. that is the answer. The haversine formula works by finding the great-circle distance between points of latitude and longitude on a sphere, which can be used to approximate distance on the Earth (since it is mostly spherical). The earth is nearly flat: Precise and approximate algorithms for detecting vulnerable regions of networks in the plane and on the sphere Balázs Vass 1László Németh2 János Tapolcai 1MTA-BME Future Internet Research Group and MTA-BME Information Systems Research Group, Department of Telecommunications and Media Informatics, Budapest University of Technology and Economics, … To calculate the actual motion of the Sun, only the motions of the four giant planets (Jupiter, Saturn, Uranus, Neptune) need to be considered. The mass of the Earth is found to be 6 sextillion, 587 quintillion short … The gaseous sphere surrounding Earth is called the atmosphere. Hence, we create models to approximate characteristics of Earth's surface, generally relying … How far would you have to drill into the earth, to reach a point where your weight is reduced by 8.0 %? a.) All examples in this section assume the WGS 84 datum, with an equatorial radius "a" of 6,378.137 km and a polar radius "b" of 6,356.752 km. One reference surface is called the Geoid, the other reference surface is the ellipsoid. For each … What is your estimate of the radius of the Earth’s sphere given the following distance/angle pairs.
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