The .Gif Friday Post No. 729 – Raccoon Recovery, Trippy Halftime & Passing Class

[Found here and here; don’t know where the raccoon came from.]

You Are Here. Or Not.

Uranium Atom’s Tightly Clustered Core Is the Main Source of Atomic Energy
Shown in Boston’s Museum of Science, this model depicts radioactive uranium 235, whose nucleus contains 92 protons and 143 neutrons. Nonfissionable uranium 238 carries three additional neutrons. Both are isotopes, or variants, of Nature’s heaviest element. Balls bunched in the center represent the protons and neutrons, which are mysteriously bound together by atomic energy’s terrific force. Splitting of the nucleus releases energy far greater than that of any chemical reaction. Wire-strung balls swinging like planets around a sun represent uranium’s 92 electrons. Hydrogen, in contrast, has one. True scale would place the outermost electrons 3,000 from the center.

[Image ca. 1954, with caption, found here via here.]

Boxing in the classroom.

Wow. That’s one sterile classroom.
Apparently cheating is prevalent in India, so here’s their solution. Now the proctor can’t tell who is whispering the answers.

[Found here, via here.]

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