feet (or 744 miles) in at least one This fence is composed of three galvanized wires and practicable to find a sheet of metal foil thick enough of spines, also galvanized, placed between and clamped place. to be air-tight and opaque, yet thin enough to be per- First, we will calculate the pressure… … other side of the barbed fence. Al- rately bright only on its surface. At though the drawing does not show the the same time a strong odor of ozone form of the barbs, it is evident that is recognizable. Substances capable cubic foot of water at that depth. Assuming that the they are ,|-shaped, and…
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