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masa sztabki :
d = m/v
m = v * d
m = 0.125 cm3 *19.28 g/cm3 = 2.41 g
V=0,5cm*0,5cm*0,5cm=0,125cm³
d=m/v
m=d*v
m=19,28g/cm³*0,125cm³=2,41g
19,28g/cm³ × 0.125 = 2,41g
dla pewnosci proszę sprawdzic