what is the total lenth of thee earth?
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Depends on where you want to measure.
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Earth is 12,742 kilometers (7,900 miles) in diameter.
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The theoretical answer is infinity as people have stated.\n\nThe practical answer is that it extends until another body's influence makes earths influence negligible.  Example, jupiter's satellites are not strongly effected by earth in any way.
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According to NASA, Earth is approximately 384,400 km from Earth.  1 km = 100,000 cm, so multiply 384,400 X 100,000 to get your answer.
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What is the speed of the Earth's rotation?\n\n--------------------------------------------------------------------------------\n\n\nAt the equator, the circumference of the Earth is 40,070 kilometers, and the day is 24 hours long so the speed is 1670 kilometers/hour ( 1070 miles/hr). This decreases by the cosine of your latitude so that at a latitude of 45 degrees, cos(45) = .707 and the speed is .707 x 1670 = 1180 kilometers/hr. You can use this formula to find the speed of rotation at any latitude.
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That depends on what you mean by the "entire world".  Planet earth is pretty much 100% material.  Any planet, or collection of planets, is also 100% material.\n\nBut the sun is plasma, and composes most of the mass in the solar system.  So the solar system is closer to 99% plasma, 1% material.\n\nBut those pesky astronomers were having trouble with some equations - seems like there was lots more stuff out there than plasma and material, but they couldn't find it.  Until recently.  They discovered load of new stuff, call "dark energy" and "dark matter" (since you can't see it from here, it must be 'dark', right?)\n\nTurns out most of the mass of the universe is dark energy and dark matter (about 95%), with the remaining little bit of plasma and regular matter.
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1.27 X 1022 KG (0.0021 Earths)
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10,756 (nearly 29 and a half earth years).\n\nI knew that knowing useless fact would one day come in useful!!
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The Moon has a surface area of 152 million square kilometers.\nThe Earth is 13.5 times larger.
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http://hypertextbook.com/facts/2001/DanielChen.shtml\n\nEarth has a surface area of 196,940,400 square miles, slightly less than a perfect ball with a diameter of 7913.5 miles (which is the mean diameter of the Earth - see "Prove it" under 103).\n\nhttp://pages.prodigy.net/jhonig/bignum/qland2.html
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Roughly 584 million miles --\n\n2 * pi * 93 million miles\n\nThe earth's orbit is actually an ellipse with eccentricity = 0.02, but the above calculation is a pretty good approximation.
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the average distance between the Earth and the Sun (approximately 150 million km or 93 million miles).
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Earth ranges from 7,926 miles to 7900 miles, depending on your location.\n\nThis is approximately 12,756km
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The percentage of the Earth's core that is solid is 4.7 %.  \n\nThe Earth's core is divided into the Inner core, which is solid, and extends for 1278 km, and the outer core, which is liquid, and extends for another 2210 km, or to a radius of 3488 km.  \n\nUsing the formula for Volume of a Sphere = (4/3) * Pi * Radius ^3 \nyou can calculate the volume of the Inner Core at 8.74 * 10^9.\nThe volume of ALL the core (Inner and Outer) is a total volume of 1.78*10^11.\n\nThe percentage of the Inner Core of the ALL the Core is \n8.74*10^9    /    1.74 * 10^11    =    4.7 %
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To answer this question, I'm going to assume the Earth is a perfect sphere.\n\nThe Earth's average radius is about 6.37*10^6 m. Then you can use trignometry to figure out the radius at 38 degrees north.\n\ncos(38 degrees)=r/6.38*10^6 m\nr is about 5.03*10^6 m\nTherefore the diameter is about 1.01*10^7 meters.
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earth= 5 billion, sun= 7 billion, sky ie universe= 12 billion\nmoon= 4 billion
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The mean radius is 6371.0 km.  The radius at any latitude is equal to that times the cosine of the latitude.  The Earth turns once on it's axis in 23 hr 56 min 4.0989 sec, or 23.93447 hrs.\n\nIt takes that long to travel 2(Pi)(6371)(cos(lat)).  Divide that distance by the time above and you're in the ball park (neglecting the difference in polar and equatorial radii).\n\nNote: The figure given for the Earth's rotation is correct according to Astrophysical Data: Planets and Stars.  The 24-hour day is measured from noon to noon - in relation to the Sun.  The Earth kind of rolls around its orbit, so after it has turned thru one rotation it has also moved along its orbit.  It has to turn for another 53.9 sec past the full rotation for the Sun to be back to due south again.