How many kilograms of the larger body are going to be heated by the impact? Once this quantity is known, it can be divided by the number of kilograms being heated to determine how many degrees they will be heated. How widespread is the influence of this impact? How deeply does it heat, and how widely? Of course, the material closest to the impact will receive most of the energy, and the energy input will go down with distance from the impact, until finally the material is completely unheated. What is the pattern of energy dispersal? Energy dispersal is not well understood even by scientists who study impactors. Here is a simpler question: If all the energy were put into melting the impacted material, how much could it melt? To melt a silicate completely requires that its temperature be raised to about 2,700°F (1,500°C), as a rough estimate, so here is the mass of material that can be completely melted by this example impact:
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