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What happens when you drink through a straw?
This question points up some key misconceptions about what a vacuum is.So you put a straw in your cup of water. If you look down the straw or could look through it, you would see that the level of water inside and outside the straw are exactly the same. This is because the atmosphere is pushing down on the water inside the straw, and it is pushing down equally hard on the water outside the straw. So the pressures are equal.When you suck on the straw, you are decreasing the pressure in your mouth and lowering the pressure of the air in the top of the straw. When that happens, the force of the atmosphere pushing on the water in the glass is higher than the force of gas inside the straw. The atmosphere forces the liquid up the straw into your mouth. So, in essence, you ARE NOT sucking the liquid into your mouth, the atmosphere is pushing it there.This is easily proved by an experiment. Try drinking water from a straw that is more than 20 meters tall. It won't work. At around 20 meters, the massive column of water inside the straw would be pulled down by gravity, with a force greater than the upward force caused by the atmosphere. Even if you completely evacuate the straw with a high-powered pump the water won't make it up the straw. This is why you can't pump water out of a well that is more than 20 meters deep in the ground. Anything deeper than that and you need to use a compressor to pump air at high pressure down into the well, to force the water out (essentially make the upward pressure higher than the atmosphere alone provides), or revert to the tried and true method using buckets.Of course, a similar principle applies with underground or artesian wells. The water there is already under greater pressure and will flow to the surface if given a path.
Why a vacuum cleaner works rather like a drinking straw?
both suck things up
Do straw float in a glass of water?
Yes, plastic drinking straws will float in water.
What prevents mercury in the tube of a barometer from running out into the container at the bottom of the tube?
The top of a barometric tube is sealed leaving no place for air to escape. It works along the same principle as a drinking straw, but in reverse. In a drinking straw, the sucking motion reduces the pressure of the air inside the straw to a lower level than the air outside the straw. Liquid resists changes in volume due to pressure and is drawn up through the tube due to the air pressure exerted on the surface of the liquid outside the straw. In a barometric tube the tube is sealed at one end, trapping a finite amount of gas in the tube. The air pressure inside and outside the tube is equal, keeping the mercury suspended at a certain level. If the pressure outside is raised, more force is exerted on the surface of the mercury outside the tube than on the surface inside. This raises the level of the mercury in the tube until the pressure of the air is equalized -- there is still just as much air in the tube, but a smaller volume at a greater pressure.
What Chianti has straw around the bottle?
Chianti Classico Raffino had the straw around the flask
What kind of simple machine is a bendy straw bendy straw?
A bendy straw can be considered a type of lever simple machine. The bending action of the straw allows for easier drinking by changing the direction of the force applied by the user.
Why the water in a drinking straw does not drip out when you press the top of the straw with your thumb?
When you press the top of the straw with your thumb, you create a seal which prevents air from entering the straw. The pressure inside the straw increases, causing the water to remain inside the straw due to the force of gravity and the seal created by your thumb.
Did the Chinese invent the drinking straw?
The drinking straw as we know it today was invented in 1888 by Marvin Stone.
Does drinking from a straw contribute to bloating?
Drinking from a straw can cause you to swallow air, which may lead to bloating.
Can you eat a straw?
No, not a drinking straw. As for straw as in grass, I guess someone could eat that.
When was the drinking straw patented?
The modern drinking straw was patented on 3 December 1888 by Marvin Chester Stone.
Who was the drinking straw made by?
Historians have four that the earliest drinking straw was made by Sumerians for drinking beer. It was used to avoid the solid byproducts of fermentation.
What is drinking straw in Malay?
Penyedup
Who created the drinking straw?
It is prehistoric.
What is the shape of a drinking straw?
oval
A drinking straw?
i like cheese
What was the first drinking straw made of?
the chinese invented the straw made of bamboo
