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Julia131517
@Julia131517
September 2021
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√4 и 11. Физика 7 класс.
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fizik34
Verified answer
N°4
p ( стали ) = 7900 кг\м^3
20 дм^3 = 0,02 м^3
m = pV
m = 7900 * 0,02 = 158 кг
Fт = mg
Fт = 158 * 10 = 1580 Н
N°11
Fтр. = ну * N
N = Fт = m * g
Fтр. = ну * m * g
m = Fтр. \ ну * g
m = 25 \ 0,05 * 10 = 50 кг
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Answers & Comments
Verified answer
N°4p ( стали ) = 7900 кг\м^3
20 дм^3 = 0,02 м^3
m = pV
m = 7900 * 0,02 = 158 кг
Fт = mg
Fт = 158 * 10 = 1580 Н
N°11
Fтр. = ну * N
N = Fт = m * g
Fтр. = ну * m * g
m = Fтр. \ ну * g
m = 25 \ 0,05 * 10 = 50 кг