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.
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:
мнас5ас4аснач5км6кв5
N = A/t,
где N - мощность, A - работа, t - время выполненной работы.
Единица измерения - Ватт [Вт]
Пример. Найти мощность потока воды, протекающей через плотину, если высота падения воды 25 м, а расход ее - 120 м3 в минуту.
Запишем условие задачи и решим ее.
Дано:
h = 25 м
V = 120 м3
ρ = 1000 кг/м3
t = 60 c
g = 9,8 м/с2
N-?
Решение:
Масса падающей воды: m = ρV,
m = 1000 кг/м3 · 120 м3 = 120 000 кг (12 · 104 кг).
Сила тяжести, действующая на воду:
F = gm,
F = 9.8 м/с2 · 120 000 кг ≈ 1 200 000 Н (12 · 105 Н)
Работа, совершаемая потоком в минуту:
A = Fh,
А - 1 200 000 Н · 25 м = 30 000 000 Дж (3 · 107 Дж).
Мощность потока: N = A/t,
N = 30 000 000 Дж / 60 с = 500 000 Вт = 0,5 МВт.
ответ: N = 0.5 МВт.