Does air occupy space

 Keep a funnel on the mouth of a bottle and fill half of it with water. Now, while filling the remaining half of the bottle, raise the funnel, a little higher. Does the speed with which the water fills the bottle remain unchanged in both the cases?



When you keep the funnel on the mouth of the bottle and pour in water through the funnel, the speed with which the water enters the bottle is very slow. But the moment the funnel is raised a little higher, the water starts rushing in at a great speed. Do you know why this happens so? It is quite obvious. When water starts filling the bottle through the funnel, it exerts pressure on the air trapped inside the bottle, and as such, the air does not get an easy escape. Though the funnel is placed on the bottle in such a way that it covers the mouth of the bottle almost fully, yet, since the covering is not airtight, the air inside manages to get a little opening to escape. Hence, the speed with which the air inside the bottle goes out remains equal to the speed with which the water fills the bottle. Thus, when the funnel is raised a little higher, the air inside the bottle gets a free outlet to escape. It is through this outlet that water wades its way through the air in the bottle by pushing it out with great speed, quite unobtrusively.

Does air occupy space Does air occupy space Reviewed by Wrestling Mirror on May 14, 2021 Rating: 5

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