How to estimate the radius of the earth with a lake wired. Point on the ellipsoid surface can be defined by the parametric curve equation. The kilometer km to earths equatorial radius conversion table and conversion steps are also listed. If we multiply this area by the amount of energy per unit area the solar insolation mentioned above, we can determine the total amount of energy intercepted by earth. Also, explore tools to convert earths polar radius or meter to other length units or learn more about length conversions. Earth radius to meters conversion length measurement. Compute the radius of the earth using the formula c circumference 2 x pi x r radius.
The radius of the earth is identified as a distance r, and is the angle the earth rotates through during this time interval t. The standard ellipsoid is an idealized surface, and the earth measurements used to calculate it have an uncertainty of 2 m. The height above sea level of the location is added. Instant free online tool for earth s polar radius to meter conversion or vice versa. The radius of earths orbit is approximately 15,000,000,000. Please enter the latitude in decimal degrees, here you can convert coordinates. The earths equatorial radius to meter m conversion table and conversion. Aug 31, 2017 when you extend an imaginary line vertically towards the center of the earth from both the sticks, they will meet exactly at the center, as we have assumed that the earth is a perfect sphere.
Instant free online tool for kilometer to earth s equatorial radius conversion or vice versa. Convert meter m to earths equatorial radius length and. Al birunis equation for radius of the earth the only other unknown in. Instant free online tool for kilometer to earths equatorial radius conversion or vice versa. The answer will be only approximate, but thats a lot better than nothing. Measure the earths radius with a nothing but a stopwatch. We deal with big and little numbers so we need a system. When and how did scientists measure the radius of the earth. This assumption leads to the international value of the earths equatorial radius of 6 378 388 meters, in round figures. The basic idea is to look at a sunrise or sunset or moonrise or moonset in a very particular manner. Solar radius is a unit of distance used to express the size of stars in astronomy relative to the sun. The earths mean radius is determined as the average distance from the physical center to the surface, based on a large number of samples. In this case, the circles radius is simply the radius of earth, which is about 6,371 km 3,959 miles on average.
Re denotes earth model radius, here defined to be 6,378 km. The earth s mean radius is determined as the average distance from the physical center to the surface, based on a large number of samples. Measure the earth s radius with a stopwatch is it possible to measure the earth s radius armed only with a stopwatch. Length describes the longest dimension of an object.
The solar radius is usually defined as the radius to the layer in the suns photosphere where the optical depth equals 23 citation needed. Radius of the earth in this experiment, the variation of gravity up the burton tower is measured with a sodin gravimeter and from those measurements you can deduce the radius of the earth. It is possible to measure the earths radius armed only with a stopwatch, a meter stick and a sunset or sunrise. What is the radius of the earth in meters the earth images. Al biruni and the measurement of earths radius convergence. What is the exact surface area of earth in square meters. We will use scientific notation all the time in this course. This equation, wgs84 earth equatorial radius meters, is used in 14 pages show. The earth s polar radius to meter m conversion table and conversion steps are also listed.
What is the radius of the earth in meters the earth. When you extend an imaginary line vertically towards the center of the earth from both the sticks, they will meet exactly at the center, as we have assumed that the earth is a perfect sphere. Using those measurements, the equatorial circumference of earth is about 24,901 miles 40,075 km. Please enter the latitude in decimal degrees, here. Therefore, if the earth is taken to be a two dimensional object, its perimeter would be equal to the circumference of a circle with radius 6. Lets call x the amount we add to the length of the rope, in our case 3 feet. For threedimensional objects it is usually measured horizontally. Basis of expression for length, size, distance in physical sciences is the meter. Measure the earths radius with a nothing but a stopwatch and. Earth radius is the distance from earths center to its surface, about 6,371 km 3,959 mi. This syntax uses the default value of 39e9 for the gradient, making the effective radius approximately 43 of the actual earth radius. Aug 16, 2018 a good approximation can be obtained by noting that the metre was originally defined as being the 10 million times the distance from the north pole to the equator through paris.
Al birunis equation for radius of the earth the only other unknown in the above equation was the height of the hill. A nominal earth radius is sometimes used as a unit of measurement in astronomy and geophysics, denoted in astronomy by the symbol r. The teory of the movement of th earth was apparently borrowed by albiruni from arya bhatta, who in the fifth century ad suggested that the earth revolved round the sund and rotated on its axis. Add 1 meter to the string and amazingly, at least to me the increased radiusdiameter is the same for a ball the size of the earth as for. Re effearthradius returns the effective radius, re, of a spherical earth, computed from the gradient of the index of refraction of the atmosphere. The radius of earths orbit is approximately 15,000,000,000 meters. Also, explore tools to convert kilometer or earths equatorial radius to other length units or. Answer questions and earn points you can now earn points by answering the unanswered questions listed. This comes to 1,097,509,500,000,000,000,000 cubic meters. Earth s polar radius is 3,950 miles 6,356 km a difference of miles 22 km.
This is roughly 6,371 kilometers km or 3,960 statute miles. Its value ranges from 6,378 km 3,963 mi at the equator to 6,357 km 3,950 mi at a pole. Also, explore tools to convert kilometer or earth s equatorial radius to other length units or learn more about length conversions. You can measure the earths radius with just a stopwatch is it possible to measure the earths radius armed only with a stopwatch. The value, symbolized r earth, is equal to approximately 6,371,000 meter s 6. Earths diameter is approximately 12,760,000 meters. The value, symbolized rearth, is equal to approximately 6,371,000 meters 6. The metre french spelling, or meter english spelling symbol. The kilometer km to earth s equatorial radius conversion table and conversion steps are also listed. If youre seeing this message, it means were having trouble loading external resources on our website. This length is also used as a unit of distance, especially in astronomy and geology, where it is usually denoted by r.
Click in the button draw a circle, then click on map to place the center of the circle and drag at same time to start creating the circle. You also need to include the sign of the earth charge in the answer. Earths polar radius is 3,950 miles 6,356 km a difference of miles 22 km. Measure the earths radius with a stopwatch is it possible to measure the earths radius armed only with a stopwatch. Instant free online tool for earths equatorial radius to meter conversion or vice versa. Details of the earthmoon system, showing the radius of each object and the earthmoon barycenter. Due to their tidal interaction, the moon recedes from earth at the rate of approximately 38 mma 1. Inside of one cubic meter you could fit seven or eight high school students. The peak of this mountain reaches an attitude of 6,263.
Earth radius to kilometers conversion length measurement. Using your estimates above, estimate the volume in meter 3 of earths atmosphere. April 22, 2017 hilman rojak leave a comment on what is the radius of earth in meters what is the radius of earth quora solved 4 the radius of earth is about 6400 kilometer mcas ion search husetts department of the moon always veers towards sun mcas ion search husetts department of. Apr 22, 2017 unled solved 4 the radius of earth is about 6400 kilometer how to determine the earth s cirference dummies what is the radius of earth s orbit quora tracevenus what is the radius of earth quorawhat is the radius of earth quorawhat is the radius of earth s orbit quoraa100 homework 1solved 4 let r.
How to measure the radius and circumference of the earth. Partner in a distant location on about the same longitude or in the same time zone. Instant free online tool for earths polar radius to meter conversion or vice versa. Add 1 meter to the string and amazingly, at least to me the increased radius diameter is the same for a ball the size of the earth as for a small ball held in your hand. The accepted value for the radius of the earth is around 6. Earth radius is the distance from earth s center to its surface, about 6,371 km 3,959 mi. His qanunalmasudi compiled in 1030 ad is the most important work on astronomy which is largely based o indian astronomical ideas. Jun 14, 2008 meanwhile, the highest point on earth is mt. Learn the relationship between the radius, diameter, and circumference of a circle. The earths polar radius to meter m conversion table and conversion steps are also listed. Also, explore tools to convert earth s polar radius or meter to other length units or learn more about length conversions. A good approximation can be obtained by noting that the metre was originally defined as being the 10 million times the distance from the north pole to the equator through paris. The radius of earth at the equator is 3,963 miles 6,378 kilometers.
Now, the angle of the sunlight to the stick would give you a latitude relative to the point on earth where the sun is directly overhead. Unled solved 4 the radius of earth is about 6400 kilometer how to determine the earth s cirference dummies what is the radius of earth s orbit quora tracevenus what is the radius of earth quorawhat is the radius of earth quorawhat is the radius of earth s orbit quoraa100 homework 1solved 4 let r. Earth radius is the distance from the center of earth to a point on its surface. Vogt here is the relationship between your height h, the time interval t, and the radius of the earth r, where r and h are measured in centimeters, t is measured in seconds, and t 240 is in units of degrees. The earths equatorial radius and the distance of the moon. If youre behind a web filter, please make sure that the domains. From the diagram above it is clear how knowing the height of the hill can give the radius of the earth, provided the declination angle theta is measured accurately. Estimate the height in meter of earths atmosphere above earths surface. Prehistoric distance from earth minimum 10 6 km 55. A modern measurement of the radius of the earth a long time ago, but on this planet, a greek philosopher created an experiment to measure the radius of the earth. Do the same thing for a ball the size of the earth.
It is defined as the length of the path travelled by light in absolute vacuum during a time interval of 1299,792,458 of a second. The problem, however, is that the angle t from the example above is the geocentric latitude, and coordinates provided in geodetic datum. A modern measurement of the radius of the earth wired. Measure the earths radius with a nothing but a stopwatch and meter stick.
515 1035 1105 411 221 1019 511 292 1088 156 1216 28 238 1221 363 190 700 609 182 192 409 393 180 551 1014 1147 1316 467 334 516 412 1383