m=po×V=720 кг/м^3 ×0.015 м^3=10.8 (кг)
Р=mg=10.8×9.8=105.84 (H)
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m=po×V=720 кг/м^3 ×0.015 м^3=10.8 (кг)
Р=mg=10.8×9.8=105.84 (H)