Tyngdekraft: tyngdekraftens retning er ledningstrådens retning, den er vinkelret på overfladen af det stille vand, lodret. I to punkter langt fra Jorden kan to ledninger siges at være parallelle. Anonym illustration fra 1925. Privat samling.(Gravity: the direction of gravity is that of the lead wire, it is perpendicular to the surface of the still waters, the vertical. At two points far from Earth, two lead wires can be said to be parallel. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
€ 122.69
Enthält 25% MwSt.
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Udateret · Engraving
· Billed-ID: 918713
Private Collection / Bridgeman Images |
0 Anmeldelser |