PHYS 0847 Lecture 2: Physics - Chapter 2
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All o(cid:271)je(cid:272)ts possess (cid:862)hidde(cid:374)(cid:863) ki(cid:374)eti(cid:272) e(cid:374)e(cid:396)g(cid:455) i(cid:374) the ti(cid:374)(cid:455) (cid:373)i(cid:272)(cid:396)os(cid:272)opi(cid:272) jiggli(cid:374)g of thei(cid:396) ato(cid:373)s. The average speed of this motion is approximately the speed of sound. Imagine if the object was actually traveling forward at the speed of sound. The atoms are jiggling, but not very violently. This enables them to stick together in tight, stable structures. The atoms are shaking enough to break up solid structures, but not enough to prevent them from clumping together. The ato(cid:373)s a(cid:396)e shaki(cid:374)g so (cid:448)iole(cid:374)tl(cid:455) that the(cid:455) (cid:271)(cid:396)eak apa(cid:396)t (cid:272)o(cid:373)pletel(cid:455) a(cid:374)d do(cid:374)"t sti(cid:272)k to ea(cid:272)h other. Collisions between atoms are so violent that the atoms themselves are smashed apart into electrons and ions. Examples are flame, lightning, the surface of the sun, etc. I(cid:374) s(cid:272)ie(cid:374)(cid:272)e fi(cid:272)tio(cid:374), plas(cid:373)a is ofte(cid:374) used i(cid:374) (cid:449)eapo(cid:374)s. this i(cid:373)plies that the (cid:862)(cid:271)ullet(cid:863) material is being heated up to the point where thermal jiggling rips the electrons from the atoms.
