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V= 24 m^^^
1,29 - 1m^^^
x - 24m^^^
x=1,29* 24
x= 30,96 kg
V= 4 × 3 × 2
V = 24cm³
24 × 1,29 = 30,96 kg
Odp. Masa powietrza w tym pokoju wynosi 30,96 kg.
d=m/v /*v
m=d*v
m=1,29kg/m3*24m3=30,96kg
masa wynosi 30,96kg