Предмет: Физика, автор: Vikusa12

Бочку массой 30 кг и объемом 1 м3 заполнили стальными деталями разной формы, а затем залили машинным маслом. Масса доверху заполненной бочки составляет 5900 кг. Плотность масла p1 = 900 кг/м3 , плотность стали 8000 кг/м3. Сколько литров машинного масла залили в бочку?

Ответы

Автор ответа: Артёмушко
0

V_1+V_2=1\m=rhocdot V\m_1=900V_1; m_2=8000V_2\900V_1+8000V_2+30=5900\left { {{V_1+V_2=1} atop {900V_1+8000V_2+30=5900}} right\left { {{V_2=1-V_1} atop {900V_1+8000(1-V_1)=5870}} right\900V_1+8000-8000V_1=5870\-7200V_1=-2130\V_1approx0,3

 

0,3 м3 = 300 л

Ответ: 300 литров.

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Writing an essay "Green world"
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Eco Living
An average family in Nigeria uses 570 kWh* of electricity a year
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