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Why a vacuum cleaner works rather like a drinking straw?

both suck things up


How much does a straw weigh?

There are many different straws in the world with different properties. Each straw for example will have a slightly different density.


Do straw float in a glass of water?

Yes, plastic drinking straws will float in water.


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.


What would be the most reasonable unit to use when describing the length of a minivan?

This unit is meter.

Related Questions

What are the dimensions of a drinking straw?

A standard drinking straw is typically around 0.2 inches (5mm) in diameter and about 7.75 inches (197mm) in length. However, there can be variations in size depending on the brand or type of straw.


How much liquid will an eight inch drinking straw hold?

It depends on the diameter of the straw, which varies. Multiply the diameter by 3.14 and the result by the length of the straw.


What is the length of 1 million straws from end to end?

It depends on the length of the straw. I would go get a straw, measure it with a ruler, and multiply that by 1,000,000. So if the straw was 4 inches, it would be 4,000,000. You could also google .... length average "drinking straw".... without the quotes.


What is the formula for calculating the capacity of a drinking straw?

A standard drinking straw is a cylinder. The formula for calculating the volume of a cylinder is: Pi x r2 x length. So, a drinking straw that is 9.5 inches long with a diameter of .25 inches (1/4 inch) has a volume calculated like this:Pi (3.1416) x radius squared (.1252 = 0.015625) x length (9.5) = 0.46633125 cubic inches


Describe how the length of the straw effects high or low?

A longer straw can lead to a higher drinking speed because it allows for a faster flow of liquid into your mouth. A shorter straw may slow down your drinking pace as it restricts the flow of liquid. This difference in flow rate can impact how quickly you can consume a beverage.


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.