How bicycle pump works?

When you pump up your bicycle tires or football, you are making use of compressed air.
Inside a bicycle pump is a small device called a valve.
A valve allows a gas or a liquid to pass through it in one direction only.
Attached to the tire is another valve.
When the plunger of the pump is pushed down, the valve attached to the tire opens and air is forced into the tire.
As the plunger is pulled back, the valve on the tire closes so that no air can escape.
At the same time, the valve on the end of the plunger allows more air into the pump.
Next time the plunger is pushed down, this air is forced into the tire.
If you place your thumb over the hole at the end of a bicycle pump and push in the pump handle, you will compress the air inside into a very small space.
It will become more and more difficult to push farther.

Read more

What is a Magnetic Field – Magnetic Field de... You can't see magnetism, but you can feel it working near a magnet.In the space around a magnet is a magnetic field. If you hold something made f...
How to Make a Paper Cup? – Art projects for ... It is very easy to make a Paper Cup and use it as a drinking cup, in cases when we are forced to drink water with our hands. All we need is a clean sh...
Rubber Band Change Trick – Rubber Band Trick... The trick of changing a rubber band from the first and second fingers to the third and fourth, if done quickly, can be performed without detection by ...
How to make a Megaphone – Cardboard Megapho... Learn how to make a  Megaphone  -  Cardboard Megaphone - excerpt from the book "The Scientific American Boy" by A. Russell Bond A sheet of light ca...
Close Menu