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ρ = 8,9 [g/cm³]
V = 4 cm³
Rozw.:
ρ = m/V
m = ρ × V = 8,9 [g/cm³] × 4 cm³ = 35,6 g
d=8,9g/cm³
m=?
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m=d*V=8,9g/cm³*4cm³=35,6g