Question

помогите пожалуйста с физикооой вопрос на 7 класс " На дне пластиковой бытылки сделайте отверстие зажмите отверстие пальцем и налейте в бутылку воды и закройте горлышко крышкой Осторожно опустите палец вода из бутылки выливаться не будет теперь Осторожно Откройте крышку из отверстия по прольётся вода Объясните наблюдаемое явление "​

Answer 1

это закон паскаля

однако давления в газах в несколько сот раз меньше чем жидкость

самое большое атмосферное давление фиксируют на уровне моря.по мере увеличения высоты давления атмосферных газов уменьшается.

Answer 2

I can help you with your physics question.

Your question is: "Make a hole in the bottom of a plastic bottle, pinch the hole with your finger and pour water into the bottle and close the neck with a lid. Carefully lower your finger, the water from the bottle will not spill out. Now carefully open the lid, water will pour out of the hole. Explain the observed phenomenon."

The answer is: The observed phenomenon is related to the pressure in the liquid and the air. When you close the lid, you create a closed system where the air pressure inside the bottle is equal to the atmospheric pressure outside. When you lower your finger, the water does not spill out because there is no pressure difference between the inside and outside of the bottle. The air inside the bottle prevents the water from flowing out of the hole.

However, when you open the lid, you create an open system where the air pressure inside and outside the bottle can change. The atmospheric pressure outside pushes down on the water surface in the bottle, creating a greater pressure at the bottom of the bottle. This pressure difference causes the water to flow out of the hole. The higher the water level in the bottle, the faster the water flows out of the hole.

I hope this helps you understand the physics behind this experiment. Have a nice day!