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When a liquid is sucked with a straw it gets into the mouth Why?
A straw works because when you suck the air out of the straw, it creates a vacuum. This causes a decrease in air pressure on the inside of the straw. Since the atmospheric pressure is greater on the outside of the straw, liquid is forced into and up the straw and into your mouth (Figure 11.1.
Why does the straw trick work?
Sealing the top of a straw with your finger stops air entering and exerting a downward force on the liquid, leaving only the upwards force of air pressure from below. These two effects cancel each other out leaving gravity as the dominant force causing the suspended liquid to drop out the bottom.
What happens if the pressure in your mouth is lower than the air pressure outside?
There is now more space to contain the same amount of air, so the air pressure is less. At this point, the air pressure in your mouth is lower than the air pressure surrounding you. The outside pressure is pushing the water up the straw harder than the inside pressure is pushing it down, so the liquid moves upwards.
When we drink a liquid from straw we suck the air from straw then liquid moves up inside the straw the rise in liquid in the straw is due to?
When you suck air from the straw, less air pushes on the water inside the straw than on the water outside of it. This imbalance causes more water to be pushed into the straw. The water will rise until the pressure created by the water column in the straw equals the air pressure difference.
Is drinking water through a straw bad for you?
If you have a motor or swallowing disorder, straws can help you safely drink beverages. Otherwise, if you only use straws for convenience, it may be healthier to ditch them. Drinking through a straw can contribute to lip wrinkles, bloating, cavities, and teeth staining.
What happens when you drink through a straw?
Drinking sugary or acidic beverages through a straw can increase the likelihood of cavities. Straws send a concentrated stream of liquid toward a small area of the teeth, which can erode enamel and cause tooth decay.