(1 point) The temperature u in a star of conductivity 3 is inversely proportional to the distance from the center: u=3x2+y2+z2√. If the star is a sphere of radius 2, find the rate of heat flow outward across the surface of the star.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

answer; how far out of place which the object finished relative to the starting location;

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