Pressure and atmospheric pressure

2018年4月12日

Pressure

Pressure … unit area (mainly) ${1m} ^{2}$ Volume of power to push the plane per) perpendicularly

Formula

Extra close brace or missing open brace

where a power [N]}{ power pushing the \frac{ side perpendicularly acts on

An example: 20 ${m}^{2}$ The pressure when I added power of 100N to a の side perpendicularly is 5N/ ${m}^{2}$ It is であり 5Pa( Pascal).

For という feeling, it is N/ ${m}^{2}$ I think that も Pa is the same thing and am OK.

※1Pa=1N/ ${m}^{2}$

※1hPa=100Pa

point!

The pressure is inversely proportional to the area that power acts on in proportion to volume of power to push the plane perpendicularly.

Atmospheric pressure

Pressure by the weight of the atmospheric pressure … air

[characteristic of the atmospheric pressure]

The atmospheric pressure acts on every direction
The atmospheric pressure acts on the surface of the object perpendicularly
The atmospheric pressure becomes small so as to go to the sky

[example of the atmospheric pressure]

A drink is in the mouth by smoking a straw. (atmospheric pressure pushes the drink to the bottom)
A sucker does not come off (pushed by atmospheric pressure from the outside)
A bag of the potato chip which I took to the top of the mountain swelled out (atmospheric pressure added to a bag of the potato chip became small)
A plastic bottle was destroyed when I let the air in the plastic bottle. (crushed by atmospheric pressure from the outside)

The atmospheric pressure on the sea level calls this 1 standard atmosphere (1atm) at approximately 1,013 hPa.

The reason why a bag of the potato chip swells out when I take a bag of the potato chip in the place of high altitudes, please refer to the following figures.

I return to a list of units

Physics

Posted by Lese