What happens to the speeds of the particles when thermal conduction is occuring within a solid? a. fast particles speed up, and slower ones slow down b. fast particles slow down, and slower ones speed up c. both fast particles and slow particles speed up d. both fast particles and slow particles slow down !

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If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)