Яку фізичну величину визначають за формулою ?
А Роботу;
В тиск;
Б потужність;
Г енергію.
2/Щоб обчислити тиск рідини на дно посудини, треба знати:
А вагу рідини і площу дна;
Б густину і висоту стовпа рідини;
В вагу і об’єм рідини.
3.Яке тіло виконує роботу?
А Нерухоме;
Б рухоме;
В те, на яке не діють сили;
Г те, яке рухається перпендикулярно до сили.
4. Який тиск чинить на землю трактор, якщо його вага дорівнює
45 000 Н, а площа обох гусениць — 1,5 м 2 ? 1
5 За який час двигун потужністю 400 Вт виконає роботу 6 кДж?
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Давление больше в левом сосуде на Δp = 2,8 (кПа)
Объяснение:
Давление на дно сосуда зависит от высоты столба и рода жидкости в сосуде. Так как жидкость у нас одна - вода, а высота разная воспользуемся формулои гидростатического давления. (Вычисляем)
Дано:
h1=38 см = 0,38 м
h2=9 см = 0,09 м
g=9.8Н/кг
p(в) = 1000 кг/м^3
Наити:
Δp - ?
p₁ = p(в)gh₁ p₁ = 1000 кг/м^3 * 9.8Н/кг * 0,38 м = 3724 (Па)
p₂ = p(в)gh₂ p₂ = 1000 кг/м^3 * 9.8Н/кг * 0,09 м = 882 (Па)
Δp = p₁ - p₂ = 3724 (Па) - 882 (Па) = 2842 (Па) ≈ 2,8 (кПа)
ответ: Давление больше в левом сосуде на Δp = 2,8 (кПа)