Pressure
principle · 1647 · Early modern era
Force per unit area; Torricelli measured atmospheric pressure.
Principles and materials it uses
- Boyle’s law — uses. A gas law.
Where it is used
- Piston pump — is used in. The pump creates a pressure difference.
- Vacuum — is used in. A vacuum is a region of low pressure.
- Hydraulics (Pascal’s law) — is used in. Pressure is transmitted through a liquid.
- Compressed air — is used in. The energy is stored as pressure.
- Hovercraft — is used in. The cushion is air at excess pressure.
- Pressure cooker — is used in. Higher pressure raises the boiling point.
- Vacuum cleaner — is used in. The pressure difference sucks in the dust.
- Espresso machine — is used in. Water is forced through under pressure.
- Haber–Bosch process — is used in. High pressure.
- Barometer — is used in. It measures pressure.
- Manometer — is used in. Gas or liquid pressure pushes a column of liquid in a tube or straightens a Bourdon tube that moves a needle.
- Blood pressure monitor — is used in. Measuring pressure.
- Haemodialysis machine — is used in. Diffusion through a membrane.
- Ventilator — is used in. Inhalation under pressure.
- Snowshoes — is used in. It lowers the pressure on the snow.
- Altimeter — is used in. Pressure falls with altitude.
- Pressurized cabin — is used in. Pressurizing the cabin.
- Tourniquet — is used in. Compressing the blood vessels.
- Autoclave — is used in. Steam under pressure.
- Inhaler — is used in. A pressurized aerosol.
- Cardiopulmonary resuscitation — is used in. Chest compressions.
- Moka pot — is used in. Steam pushes water through the coffee.
- Carbonated water — is used in. The gas dissolves under pressure.
- Aerosol can — is used in. A propellant gas.
- Column — is used in. It works in compression.
- Road roller — is used in. Compaction.
- Fire extinguisher — is used in. Expelled by gas.
- Revolving door — is used in. It keeps warm air in.
- Diving regulator — is used in. Supply at the pressure of the depth.
- Diving bell — is used in. The air is compressed by the water.