01 Force and Motion II
02 Pressure
03 Electricity
04 Electromagnetism
05 Electronics
06 Nuclear Physics
07 Quantum Physics

2.2.3 Applications of Atmospheric Pressure

Syringe

  1. When the piston is pulled up, the atmospheric pressure inside the cylinder will decrease.
  2. The atmospheric pressure outside pushes the liquid up into the syringe.

Lift Pump

Siphon

Working Mechanism of Siphon

Sucker Hook

When the sucker is pressed into place, the air inside is forced out. As a result, the pressure inside the sucker become very low. The sucker is then held in position by the high atmospheric
pressure on the outside surface.

Straw

When a person sucks through the straw, the pressure in the straw become low. The atmospheric pressure outside which is higher will force the water into the straw and consequently into the mouth.

Rubber Sucker

Vacuum Cleaner