V=S*h=3*0.24=0.72 м3
m=p(плотность)*V=900*0.72=648кг
Наверно так)
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Дано:
р=1000Па
р=800кг/м3
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h-?
решение:
p=pgh
h=p/pg
h=1000/(800*10)=0,125м=12,5см
100*5=500гр переводим в кг =0.5 кг. честно не помню но вроде бы находится по этой формуле F=mg F=0.5*10=5H