Fyzikální rozměr kg · m2 · s−2 odpovídá jednotce:
Správná odpověď je: E
Fyzikální rozměr jednotky lze zjistit ze vzorce pro výpočet příslušné fyzikální veličiny. Hertz je jednotkou frekvence a lze ji vypočítat podle vzorce . Rozměr hertzu je tedy:
Hz = 1/s = s−1.
Pascal je jednotkou tlaku, z jehož vzorce lze vyjádřit pascal jako:
Pa = kg · m · s−2/m2 = kg · m−1 · s−2.
Watt je jednotkou výkonu se vzorcem , pro watt tedy platí:
W = J/s = J · s−1 = (kg · m · s−2) · s−1 = kg · m2 · s−3.
Henry je jednotkou indukčnosti, v jejímž vzorci figuruje elektrický proud s jednotkou ampér (A).
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