0,22 г/см³ = 0,22· 1 000 000 : 1 000 = 220 кг/м³
22,4 л = 22,4дм³ = 22,4 : 1000 = 0,0224 м³
1520г = 1520 : 1 000 = 1,52кг
<span><span><span><span>Цвет</span></span></span></span><span><span><span><span>Длина волны (н/м)</span></span></span></span><span><span><span><span>Частота колебаний в секунду (млрд)</span></span></span></span><span><span><span><span>Красный</span></span></span></span><span><span><span><span>800-650;</span></span></span></span><span><span><span><span>400-470</span></span></span></span><span><span><span><span>Оранжевый</span></span></span></span><span><span><span><span>640-590;</span></span></span></span><span><span><span><span>470-520</span></span></span></span><span><span><span><span>Желтый</span></span></span></span><span><span><span><span>580-550;</span></span></span></span><span><span><span><span>520-590</span></span></span></span><span><span><span><span>Зеленый</span></span></span></span><span><span><span><span>530-490;</span></span></span></span><span><span><span><span>590-650</span></span></span></span><span><span><span><span>Голубой</span></span></span></span><span><span><span><span>480-460;</span></span></span></span><span><span><span><span>650-700</span></span></span></span><span><span><span><span>Синий</span></span></span></span><span><span><span><span>450-440;</span></span></span></span><span><span><span><span>700-760</span></span></span></span><span><span><span><span>Фиолетовый</span></span></span></span><span><span><span><span>430-390;</span></span></span></span><span><span><span><span>760-800</span></span></span></span>
a = V - Vo/t = 0 - 2/5 = -0.4 м/с²
Ур-е V(t): V = Vo - at, откуда:
V = -0.4t - ур-е зависимости V(t)
Ур-е S(t): S = Vot - at²÷2, откуда:
S = -0.2t²÷2 - ур-е зависимости S(t)
F=?
m=39 г
g=10 H/кг
Розв'язання
F=mg
F=39*10=390H
Відповідь:390 H