Предмет: Физика, автор: gohgalterdara

куб выполнен из материала плотность которого равна 5.5 г/см^3. Длина грани куба равна 6 см. Внутри куб полый. Вычисли массу полого куба, если толщина стенки 1.5 см.Даю 50 баллов.Буду очень благодарна.

Ответы

Автор ответа: DedStar
1

Ответ:

Объяснение:

1)

Внешний объем куба:

V₀ = 6³ =  216 см³

2)

Объем полости:

V₁ = (6 - 2·1,5)³ ≈ 27 см³

3)

Объем материала:

V = 216 - 27 = 189 см³

4)

Масса:

m = ρ·V =5,5 · 189 ≈ 1 040 г

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