how hot is the earth's core in kelvin?
346994
Stated here:\n\nhttp://www.windows.ucar.edu/tour/link=/earth/Interior_Structure/interior.html&edu=high\n\nThe Earth's core heats to about 9000 degrees farenheit.  (if you have a different number, use that.)\n\nTo change Farenheit to Kelvin, you use the formula:\n\n\nK = (°F + 459.67) / 1.8\n\nso plugging in 9000 for farenheit, if my calculations are correct, the Earth's core should be about 5255.37 K
830202
Depends on pressure/altitude.  At sea level its about 100C or 212F.
484046
Two main sources.  The first is that when the earth formed, it was very hot. The earth formed from a cloud of gas and dust, and then gained size from larger asteroids crashing into it for millions of years.  This left the early earth as a ball of lava. Because the earth is so large, it cools very slowly.\n\nSince the earth cooled from the outsize in, it eventually formed a crust, which insulates the inside even more, and slows down the cooling process. A good portion of the heat inside the earth is left over from its creation, about 4.5 billion years ago.\n\nThe other source of heat is the decay of radioactive elements inside the earth.  In the liquid early earth, the heaviest elements would have sunk to the middle. The earth's core is believed to be made mostly of iron, but there are traces of uranium and radioactive isotopes of  thorium, and potassium.
538992
Earth's core is thought to be made of molten nickel-iron. The core is about 2100 miles in radius, with a temperature of approximately 13,000 degrees Fahrenheit.
50615
While it is not easily measurable, it is able to be calculated.  Seems the concensis is aroud one million degrees kelvin.
385457
In F, it's -459.39, in kelvin, it's zero, in celsius it's -273
151136
278K. In the Kelvin system, 0'C = 273K. Also, there is no "formula" for converting between celcius and kelvin. You just add or subtract. It's basically a shift of origin type of thing where you move the origin from 0 to 273.
51474
Actually, the very center of the earth is solid, composed mostly of iron and some nickel.  It's a solid because of the extreme pressures at the center of the earth (solids typically have denser crystal structures than their liquid forms).  It's very, very hot down there, but the effect of the pressure keeping the core solid outweighs the tendency of high temps to melt it.  Higher up, away from the inner core, the outer core is in fact molten, and this is due to the very high temperatures.  Here, the effect of the high temperatures outweighs the effect of the high pressures (not as high as in the inner core), and the material exists in its less dense, liquid form.
915920
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 %
1173782
Even though I like Oz's answer, it is actually the flow of magma in the Earth's mantle on average about 30 miles below the surface, where molten rock flows from high to low, nearing the earth's outer core where the temprature reaches to near 10000 degrees F.  Another heating element (or actually energy element, that has a side effect of heating) is radioactive decay.  Though most of the Earth's heat energy is released throught the much thinner parts of the crust that makes up the ocean floors.
142627
First we must use the Kelvin scale as is the only absolute scale starting from 0. You have quantified the amount of cold so you must use an asbolute scale. Kelvin measures the absolute temperature with 0 representing NO kinetic motion whatsoever of the molecules. Kinetic motion is another way of defining temperature. That said here we go:\n\n0 degrees F is ~255K so half of that is 122.5K which is -233.57 degrees F. \n\n0 degrees C is ~273K and half of that is 136.5K which is -136.5 degrees C. \n\nNumbers are all approximate.\n\nAlternatively, you can set an arbitrary definition for cold say 40 degrees F which is 278K. If its 255K (0 deg f)today, then you take the difference between 278 and 255 and multiply it by 2 and you get 46K. Substract the difference from 255 and you get 204K which is -92 deg farenheit.\n\nI hope I didnt lose you yet but I actually had fun doing this ;)!
269371
There is no theoretical highest temperature, except that all matter would turn into pure energy at some point above 10^26 Kelvins. Beyond that, there is no absolute highest temperature.
266364
It's 4000 degrees C at the center of the Earth. That'd pretty much do the trick.
134127
I assume that you don't mean local temperature since you could just refer to the local weather report.  Instead one can speak of a theoretical temperature of the Earth based upon its distance from the Sun, size of the Earth and reflectivity (or albeto) of the Earth.  \nThis temperature comes out to about 255K or -18C or -1F.\nOther effects such as greenhouse and radioactivity make this temperature higher.\n\nAn explanation of something like this can be found at the URL in the source.
1156287
it's the core of the earth. lava. melted rock.etc
603146
*\nGetting to the Core\nDon't believe Jules Verne. The center of the Earth is not a nice place to visit, unless you like hanging out in a blast furnace. The outer core of the Earth, about two-thirds of the way to the center, is molten iron. Deeper yet, at the inner core, the pressure is so great -- 3.5 million times surface pressure -- that iron solidifies, even though the temperature is believed to exceed 11,000 degrees Fahrenheit, hotter than the surface of the sun.\n\nDespite rapid advances in high-pressure laboratory techniques, it's not yet possible to duplicate these conditions experimentally, and until Stixrude and Cohen's work, scientists could at best make educated guesses about iron's atom-to-atom architecture -- its crystal structure -- at the extremes that prevail in the inner core. Using a quantum-based approach called density-functional theory, Stixrude and Cohen set out to do better than an educated guess. With recent improvements in numerical techniques, density-functional theory had predicted iron's properties at low pressure with high accuracy, leading the researchers to believe that with supercomputing they could, in effect, reach 3,000 miles down into the inner core and pull out what they needed.\n\n\nCRYSTAL AT THE CENTER OF THE EARTH: Anisotropy of Earth's Inner Core  [New Window] \nThere's a giant crystal buried deep within the Earth, at the very center, ... The center of the Earth is not a nice place to visit, unless you like hanging ...\nhttp://www.psc.edu/science/Cohen_Stix/cohen_stix.html
551301
The interior of the Earth reaches temperatures of 5650 ± 600 kelvins [3] [4]. The planet's internal heat was originally generated during its accretion (see gravitational binding energy), and since then additional heat has continued to be generated by the decay of radioactive elements such as uranium, thorium, and potassium. The heat flow from the interior to the surface is only 1/20,000 as great as the energy received from the Sun.