Собъяснение точечное тело все время двигалось в одром направлении. половину пути оно двигалось со скоростью, модуль которой равен 10м/с, а вторую половину - со скоростью, модуль которой равен 20 м/с. опркделите среднюю путевую скорость тела.

1/vcp = 1/2v1 +1/2v2 2/vcp = 1/v1 +1/v2 2/vcp = 1/10 +1/20 2/vcp = 3/20vcp/2 = 20/3 vcp = 40/3 =  13,3 м/с

Условие равновесия столба жидкости в капилляре: fp = fтяж fтяж = mg = p v g = p  π r^2 h g по 3 закону ньютона fp (равнодействующая сила) = fпов (сила поверхностного натяжения воды) fp =  σ l =  σ 2  π r приравнивая выражения fp и fтяж, выражаем диаметр капилляра: d = (4  σ) / (p g h).плотность воды p = 10^3 кг/м^3, коэф-т поверхностного натяжения воды при 20  °с  σ = 72,25*10^-3 н/мd = (4*72.25*10^(-3)) / (10^(4)*3.6*10^(-2))  ≈  0.000802 м или 0,802 мм

аквпикнр5е6пкраеркврин526462еач5кигач5а. 256н6е6а5крнпмннмн7м6пм6пм6пир7ир6мр6м6емнпмнпмнпву4а6ем4аеRead the text again and write next to the sentences True/False according to the text.

1. She looks after the big animals.

2. Her favorite animals are the tigers.

3. There are four elephants at the zoo.

4. Molly gets up at 6 o'clock.,

5. The lions eat salad.

6. The animals drink water.Read the text again and write next to the sentences True/False according to the text.

1. She looks after the big animals.

2. Her favorite animals are the tigers.

3. There are four elephants at the zoo.

4. Molly gets up at 6 o'clock.,

5. The lions eat salad.

6. The animals drink water.Read the text again and write next to the sentences True/False according to the text.

1. She looks after the big animals.

2. Her favorite animals are the tigers.

3. There are four elephants at the zoo.

4. Molly gets up at 6 o'clock.,

5. The lions eat salad.

6. The animals drink water.Read the text again and write next to the sentences True/False according to the text.

1. She looks after the big animals.

2. Her favorite animals are the tigers.

3. There are four elephants at the zoo.

4. Molly gets up at 6 o'clock.,

5. The lions eat salad.

6. The animals drink water.Read the text again and write next to the sentences True/False according to the text.

1. She looks after the big animals.

2. Her favorite animals are the tigers.

3. There are four elephants at the zoo.

4. Molly gets up at 6 o'clock.,

5. The lions eat salad.

6. The animals drink water.

Объяснение:

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