Modelová Otázka ID 2635 - 
Které fyzikální veličině odpovídá jednotka o rozměru m−1?
Správná odpověď je: D
Rozměr jednotky dané fyzikální veličiny lze určit ze vzorce pro tuto veličinu. Hybnost lze vypočítat podle vzorce 
, její jednotkou je:
[p] = kg · m · s−1.
Hertz je jednotkou frekvence s rozměrem s−1, vůbec se tedy nejedná o samostatnou veličinu. Jednotkou obsahu je m2. Jednotkou optické mohutnosti je dioptrie a lze ji vypočítat podle vzorce 
, jednotkou tedy je:
[Φ] = 1/m = m−1.
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