dip a transparent bottle in water then watch what happens and explain why it happens
Answers
Answer:
Did you notice the only time the water poured out of the bottle was when you weren’t covering the hole on the top? Isn’t that strange? There’s a hole there, why doesn’t the water come out? Shouldn’t gravity be pulling it down? There are different forces involved besides gravity. Air pressure is a strong force and it always acts in a certain way: High Pressure moves towards Low Pressure.
This basically means “more air” moves to “less air.” It is how wings cause flight, how spray paint cans works, how a plunger works, and much more! If there is a “vacuum” (a place with no air or less air than normal) then air will rush in to fill that void. So where does that happen in the Drip Drop Bottle?
When you cover up the lid to the bottle, the water is pulling down but that air up in the top of the bottle is becoming a vacuum. That means “low pressure.” The air pressure outside the bottle is higher, so it actually tries to push into the bottle through the bottom hole. In doing so, it keeps the water in!
When you release the hole on the top, there is no vacuum, so the water is free to flow out the hole into your sink.