oblicz masę powietrza w pokoju o wymiarach 3m x 4m x 2,5m
V=3*4*2,5=36m3=36000dm3
d=1,29g/dm3
m=V*d
m=36000dm3*1,29g/dm3=46440g=46,4 kg
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V=3*4*2,5=36m3=36000dm3
d=1,29g/dm3
m=V*d
m=36000dm3*1,29g/dm3=46440g=46,4 kg