In tropical latitude its average height is 16 km. Top Users +116129 CPhill moderator +112580 Melody moderator +31722 Alan … The mass of the Earth is found to be 6 sextillion, 587 quintillion short … The inner radius is a = 14.6 cm and the outer radius is b = 43.8 cm. The diameter of the Earth at the equator is 7926.68 miles (or 12756.75 km). 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 … 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). Given : Radius of the Earth = 6400 km. The radius of the Earth is … More recent measurements have measured the geoid to unprecedented accuracy, revealing mass concentrations beneath Earth's surface. These are illustrated in the figure below. For many purposes, we can ignore the variation from a sphere; but, if accuracy matters, the Earth is best described as a geoid. 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. Determining the precise shape of the geoid is a major concern of the science of geodesy, the study of Earth’s size, shape, and gravitational and magnetic fields. The primary reason Earth is not a sphere is because its rotation results in a centrifugal force that opposes gravity. How far would you have to drill into the earth, to reach a point where your weight is reduced by 8.0 %? (c) will be same everywhere in magnitude directed towards the centre. In fact, its shape is so close to a sphere that it is often called a spheroid rather than an ellipsoid. $\endgroup$ – Gaialogist Apr 29 '14 at 17:07 4/3 *22/7 *(6400)^3 =1098508190476.1904761904761904762. Ask yourself why a round earth makes this possible. Approximate the Earth as a uniform sphere. Assume that drag is a function of the sphere diameter, d, the pipe dianeter, H, the fluid velocity, V, and the fluid . The … Our descriptions of Earth's surface must be simpler than reality in order to be tractable. 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. 31978. Earth turns on its axis approximately once every 24 hours. Now, to find the radius, divide the diameter by 2 (because any radius is exactly half of its diameter). For each … People who have traveled by air or solely checked flight routes have probably noticed that flights don’t follow a … A hollow sphere has a uniform volume charge density of 4.61 nC/m3. Volume of a sphere formula. 54 Online Users. Hence, we create models to approximate characteristics of Earth's surface, generally relying … C)The sailboat appears smaller as it moves farther away. Sasini Feb 1, 2015. 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). Measurements of a lake’s width were taken at 15-foot intervals, as shown: x= 0 15 30 45 60 75 90 105 … 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. Let m2 = mass of entire earth (of radius r1) Let m3 = mass of earth (of radius r2) Look up in your physics book. Let F2 = weight in the hole at radius r2. A spheroid is simply an ellipsoid that approximates a sphere. Between the troposphere and the stratosphere is the tropopause which marks the approximate upper limit of mixing in the lower atmosphere. $\begingroup$ 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. The volume of a sphere is 4/3 x π x (diameter / 2) 3, where (diameter / 2) is the radius of the sphere (d = 2 x r), so another way to write it is 4/3 x π x radius 3.Visual on the figure below: Since in most practical situations you know the diameter (via measurement or from a plan/schematic), the first formula is usually most useful, but it's easy to do it both ways. These examples are two common world spheroids used today with their values rounded to the nearest meter. radius of the earth is 6400. and also the formula is 4/3 pi r^3 to find the volume of the 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 … Approximate the earth as a uniform sphere. Several models with greater accuracy have been developed so that coordinate systems can serve the precise needs of … There are several reasonable ways to approximate Earth's shape as a sphere. (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. What is the magnitude of the electric field at 21.9 cm from the center of the sphere? Great circle distance. There is one further zone of heating, above the mesosphere and more than 90 km. Post New Answer . The Earth's magnetic field at the Equator is approximately 0.4 G. Estimate the Earth's magnetic dipole moment. Unclear because no context is provided. Also no effort is made to answer the question. But for some purposes you can approximate Earth was a uniform sphere - it's going to depend on what accuracy you require. The earth is an approximate sphere. The great … ExamplesEarthThe radius of the earth is given by 6400 km thus its surface will be 500 million square kilometers. a.) What is your estimate of the radius of the Earth’s sphere given the following distance/angle pairs. The atmosphere is one of four subsystems on Earth. Treebeard . Many astronomical and navigational computations use it as a surface representing the Earth. Advertisement Remove all ads. Physics. The sphere is an approximation of the figure of the Earth that is satisfactory for many purposes. $\endgroup$ – sammy … The Flat Earth’s Society Earth map Credit: Wikimedia Commons. One reference surface is called the Geoid, the other reference surface is the ellipsoid. Physicists often approximate the shape of the Earth as a sphere even though more accurate representations are possible, because many physical characteristics (e.g., gravity) are much easier to calculate for a sphere than for other shapes. A sphere being a gross approximation of the spheroid, which itself is an approximation … In order to find the volume of the Earth you need more information than just the volume of a sphere formula. 2.The diagrams below represent photographs of a large sailboat … The gaseous sphere surrounding Earth is called the atmosphere. They have a fairly interesting map of the Earth as well. 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. Edit Added Sun, 22 May '16 . A geoid is the equipotential surface of the Earth's gravity field; put simply, it has the shape of a lumpy, slightly squashed ball. Somewhere it should derive the fact that outer shells exert … Approximate the Earth as a uniform sphere. that is the answer. 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. 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. However on the spherical surface area, those will be somewhat shorter than had the Earth been flat. 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). A great circle (also orthodrome) of a sphere is the largest circle that can be drawn on any given sphere.
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