Jaká je přibližně normální hodnota atmosférického tlaku?
Správná odpověď je: B, C, D
Za normální hodnotu atmosférického tlaku vzduchu je považována hodnota tlaku na hladině moře, která je rovna:
101 325 Pa = 101,325 kPa = 1 atm (atmosféra).
Odpovídá tak přibližně 105 Pa. Torr, někdy též značený mmHg (milimetr rtuťového sloupce), je stará jednotka tlaku. 1 Torr odpovídá tlaku na dně sloupce rtuti o výšce 1 mm. Přibližně platí, že:
1 Torr = 133,322 Pa, tedy 1 Pa = 0,0076 Torr.
105 Pa = 105 · 0,0076 Torr = 760 Torr.
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