Предмет: Физика, автор: Аноним

Помогите пожалуйста, даю 35 баллов. Физика 7-класс

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Ответы

Автор ответа: ZlataSergeeva2000
1

Ответ:

Наибольшее давление 9192 Па

Наименьшее давление 4354 Па

Объяснение:

Дано:

а = 19 см

b = 11 см

с = 9 см

m = 9.1 кг

g = 10 Н/кг

Найти:

р max - максимальное давление

p min - минимальное давление

Решение:

Максимальное давление оказывает кирпич, стоящий на меньшей грани

Smin = b · c = 11 · 9 = 99 см² = 9,9·10⁻³ м²

р max = mg : S min = 9.1 · 10 : 9,9·10⁻³ = 9191.(91) (Пa) ≈ 9192 Па.

Минимальное давление оказывает кирпич, стоящий на большей грани

Smax = a · b = 19 · 11 = 209 см² =2,09·10⁻² м²

р max = mg : S min = 9.1 · 10 : 2,09·10⁻² ≈ 4354.067 (Пa) ≈ 4354 Па.

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