The diameter of the Earth at the equator is 7926.68 miles (or 12756.75 km). A hollow sphere has a uniform volume charge density of 4.61 nC/m3. Now, to find the radius, divide the diameter by 2 (because any radius is exactly half of its diameter). Approximation is also used to analyze the motion of several planets orbiting a star. a.) A sphere being a gross approximation of the spheroid, which itself is an approximation … Add a Comment Solutions 0. 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 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). 2.The diagrams below represent photographs of a large sailboat … 54 Online Users. (b) will have the same value everywhere but not directed towards the centre. (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. If the Earth was substantially displaced from the center, this division into visible and … Between the troposphere and the stratosphere is the tropopause which marks the approximate upper limit of mixing in the lower atmosphere. (d) cannot be zero at … ssuming that Earth's magnetic field is due to a bar magnet at the centre of the Earth, … The earth's shape is a spheroid. Measurements of a lake’s width were taken at 15-foot intervals, as shown: x= 0 15 30 45 60 75 90 105 … It is formed by the intersection of a plane and the sphere through the center point of the sphere. Let F1 = weight on the surface at radius r1. These examples are two common world spheroids used today with their values rounded to the nearest meter. Consequently, two main reference surfaces have been established to approximate the shape of 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. These are illustrated in the figure below. The inner radius is a = 14.6 cm and the outer radius is b = 43.8 cm. A geoid is the equipotential surface of the Earth's gravity field; put simply, it has the shape of a lumpy, slightly squashed ball. Several models with greater accuracy have been developed so that coordinate systems can serve the precise needs of … As the centuries passed, scientists and explorers began to realize that the earth was not a perfect sphere. Also no effort is made to answer the question. People who have traveled by air or solely checked flight routes have probably noticed that flights don’t follow a … Think about it: if the earth was flat, it wouldn’t make a difference if you stood up quickly after the sunset — the sun would still be gone below the flat edge of the earth. The great … and in polar latitude it is only 10 km. Somewhere it should derive the fact that outer shells exert … There is one further zone of heating, above the mesosphere and more than 90 km. Hence, we create models to approximate characteristics of Earth's surface, generally relying … earth. In order to find the volume of the Earth you need more information than just the volume of a sphere formula. Calculus . 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’. so the volume of the earth is: 4/3 pi r^3. $\endgroup$ – sammy … Each preserves a different feature of the true Earth in order to compute the radius of the spherical model. from the Earth’s … $\begingroup$ We simply know that the Earth would have the same volume (incompressibility is assumed) and would be a sphere if it were not rotating, thus a polar radius of 6371 km. 8.1 The earth is an approximate sphere. … The earth is approximately a sphere (actually it is sphere slightly flattened at the poles). 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 … B)The tide is causing an increase in the depth of the ocean. Rapper B.o.B wants to launch a satellite into space to find out, once and for all, whether the Earth is flat or round. Our descriptions of Earth's surface must be simpler than reality in order to be tractable. Edit Added Sun, 22 May '16 . In fact, its shape is so close to a sphere that it is often called a spheroid rather than an ellipsoid. Treebeard . Note that the distances are given below meters, and angle in degrees, and calculators or spreadsheets may require you enter trigonometric angles in radians for trigonometric … 4/3 *22/7 *(6400)^3 =1098508190476.1904761904761904762. Closer approximations range from modeling the shape of the entire Earth as … $\endgroup$ – Gaialogist Apr 29 '14 at 17:07 The earth is an approximate sphere. Let m2 = mass of entire earth (of radius r1) Let m3 = mass of earth (of radius r2) Look up in your physics book. radius of the earth is 6400. and also the formula is 4/3 pi r^3 to find the volume of the sphere. 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. Earth turns on its axis approximately once every 24 hours. 31978. In tropical latitude its average height is 16 km. Although the earth's shape is technically an ellipsoid, its major and minor axes do not vary greatly. Approximate the earth as a uniform sphere. Approximate the Earth as a uniform sphere. Comment . But for some purposes you can approximate Earth was a uniform sphere - it's going to depend on what accuracy you require. 2 $\begingroup$-1. Cute. What is . Given : Radius of the Earth = 6400 km. Let F2 = weight in the hole at radius r2. In fact the errors will be given by … Let m1 = mass of person. The Flat Earth’s Society Earth map Credit: Wikimedia Commons. If some astronomical catastrophe suddenly brought Earth to a screeching halt (a physical impossibility as far as we know), with . 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. Sasini Feb 1, 2015. ExamplesEarthThe radius of the earth is given by 6400 km thus its surface will be 500 million square kilometers. 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, …