2008-04-12

Application of Atmospheric pressure

Applications of atmospheric pressure:

Drinking Straw

1. When drinking with a straw, one has to suck the straw. This causes the pressure in hte straw to decrease.

2. The external atmospheric pressure, which is greater, will then act on the surface of the water in the glass, causing it to rise through the straw.


Rubber Sucker

1. When the rubber sucker is put onto a smooth surface, usually a glass or tiled surface, the air in the rubber sucker is forced out. This causes the space between the surface and the sucker to have low pressure.

2. The contact between the rubber sucker and the smooth surface is airtight.

3. The external atmospheric pressure, which is much higher, acts on the rubber sucker, pressing it securely against the wall.

Siphon

1. A rubber tube can be used to siphon liquid from a container at a higher level to another at a lower level. For example, we can remove petrol from the petrol tank of a vehicle or dirty water from aquarium.

2. The tube is first filled with the liquid and one end is placed in the liquid in the container A. The other end is placed at a level which must be lower than the surface of the liquid in container A.

3. The pressure in the rubber at the lower end is equal to atmospheric pressure plus the pressure due to h cm column of liquid. As the pressure at the lower end is greater than the atmospheric pressure, the liquid flows out.

Vacuum Cleaner

1. vacuum cleaner applies the principle of atmospheric pressure to remove dust particles. When it is switched on, the fan sucks out the air from space inside the vacuum (space A). Space A then becomes a partial vacuum.

2. The atmospheric pressure outside, which is greater, then forces air and dust particles into the filter bag. This traps the dust particles but allows the air to flow through an exit ath the back.

Lift Pump

1. A lift pump is used to pump water out of a well or to a higher level. The greatest height to which the water can be pumped is 10 m. This is equivalent to the atmospheric pressure.

2. When the plunger is lifted, the upper valve closes and the lower valve opens. The atmospheric pressure, acting on the surface of the water, causes water to flow past valve B into the cylinder.

3. When the plunger is pushed down, the lower valve closes and the upper valve opens. Water flows above the plunger.

4. When the plunger is next lifted, the upper valve closes again and the lower valve opens once more. the atmospheric pressure, acting on the surface of the water, forces water past the lower valve into the cylinder. Simultaneously, the water above the plunger is lifted and flows out through the spout.

5. This process is repeated until sufficient water is obtained.

62 comments:

Anonymous said...

sir knight kg

Anonymous said...

what about the syringe and toilet bowl plunger

Anonymous said...

needs more answers, its very precise and short.It doesnt really explain air pressure very well. But the language is very clear to understand and is well labeled with diagrams

Anonymous said...

what about farting and burping?

Anonymous said...

what about farting and burping?

Anonymous said...

what is the answer for
A camel can move fast in desert where it is full of sand. Give reason

Anonymous said...

i can't get my information easily..........

Anonymous said...

Good Information!

Anonymous said...

Very Good
Thanks

Anonymous said...

Want to ask something, can I?

Anonymous said...

Want to ask something, can I?

Anonymous said...

Want to ask something, can I?

Anonymous said...

Want to ask something, can I?

Anonymous said...

Want to ask something, can I?

Anonymous said...

the camel can move faster because it has broad, flat feet which increases the are of contact therefore pressure is reduced


Anonymous said...

the camel can move faster because it has broad, flat feet which increases the are of contact therefore pressure is reduced


Unknown said...


thanks....very useful

Anonymous said...

Not very much. Too short and this given on all sites

Anonymous said...

very useful nerds

Anonymous said...

just need short answer

Lecian leosen said...

What about of bicycle pump,force pump and syringe?

Ashok said...

I cant got answer easily........

Anonymous said...

Camel can walk easily on the sand because it's broad feet cover more area which results in less pressure.... thus, camel needs less pressure to walk on the sand... (more the area less the pressure)

Anonymous said...

I was hoping for a explanation while what I got was a small one lined answer which was less information compared to what is needed to understand something. I hope that you would reflect upon it and do the needful.

Unknown said...

Very tutty

Unknown said...

Nice!!!
Good!!!

Unknown said...

Very good

Anonymous said...

good
fu

Unknown said...

Can help who need to make g.o.

Unknown said...

It is quite good , more examples and better explanation is needed

Unknown said...

Because it has flat broad feet.This increase the area of contact with sand

Unknown said...

I can't get all the information I need.
It is too little. But the ones there are useful though. Add more applications ,like 20 or so .
THANKS

Unknown said...

It has large paws so it doesn't sink which exerts less pressure on the sand.

Unknown said...

Because they have broader feet

Unknown said...

Hi

Unknown said...

Nice it help in my assignment

Unknown said...

ASSHOLE

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Unknown said...

Okay

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Anonymous said...

What about syringe

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Caleb Owen said...
This comment has been removed by the author.
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