Is atmospheric pressure a force

1.

Equivalent to 1.0336 kg of atmospheric pressure on an area of one square centimeter

The international unit of

pressure is Pascal, abbreviated as PA, and the symbol is PA. Other commonly used units are: bar (1 bar = 100000 PA) and CMHG (or CMHG)

because after conversion: a standard atmospheric pressure = 1.013 × 105 PA, 1 standard atmospheric pressure = 760 mm mercury column height

then a standard atmospheric pressure is equal to the weight of a 760 mm high mercury column, which is equivalent to 1.0336 kg of atmospheric pressure on an area of one square centimeter. Because the weight and length units used in different countries are different, so the pressure units are not unified, which is not convenient to compare and analyze the global pressure. Therefore, it is universally stipulated that & quot; HPA & quot; As a unit of air pressure

extended data

in terms of measurement methods, there are two kinds of commonly used measuring instruments in meteorology: liquid (such as mercury) barometer and solid (such as metal empty box) barometer

the pressure record is measured by the barometer or barometer installed in the air pressure chamber with little change in temperature and sufficient light. There are timing pressure record and continuous pressure record. The time pressure record of manual visual observation is measured by moving or fixed channel mercury barometer, which is observed 4 times a day at the basic station and 24 times a day at the reference station

The metal elastic film box is used as the sensor to record the time pressure, which can obtain the pressure record at any time. These instruments are used to measure the air pressure of the station, and the sea level air pressure can be calculated according to the sea level height of the station, the air pressure of the station, the air column temperature and other parameters

2. Right! According to the definition of pressure, it can be calculated in this way

3. I'm glad to answer for you.
there is no relationship between atmospheric pressure and mechanics.
there is no relationship between snow including inertia and some dynamics and pressure

4. In this case, we can also draw a simple diagram for stress analysis
after drawing the diagram, we found that if we want to make the water flow out, there is a downward pressure. Upward has the spring force, at the same time the internal pressure also has a force upward
the upward force of the internal pressure is the pressure difference between the inside and outside of the bottle
because the bottle itself is placed on the table, but it is not compressed by atmospheric pressure, because there is a small hole on the top to connect with the atmosphere, which means that the initial pressure inside the bottle is PNI = P0
by reading the questions, we can know that when pressing down, the small hole will be blocked and the internal pressure will increase. The former p-nei = P 0, and then it becomes larger, so p-nei '& gt; P0
so the pressure difference is p-inner '- P0

if you don't understand, you can ask

5. Atmospheric pressure is the pressure proced by the gravity of the atmosphere around the earth. Its size is related to height, temperature and other conditions. Generally, it decreases with the increase of height. For example, the atmospheric pressure on the mountain is much lower than that on the ground. In the horizontal direction, the difference of atmospheric pressure causes the flow of air
the unit of atmospheric pressure is also Pascal. The pressure of standard atmospheric pressure is 1.01 × 10 ^ 5 Pascal.

6. Atmospheric pressure is the standard atmospheric pressure. The standard atmospheric pressure is the pressure at sea level under the standard atmospheric conditions. It was proposed by physicist Torricelli in 1644. Its value is 101.325kpa, which is the unit of pressure, recorded as ATM
atmospheric pressure refers to the actual pressure of the atmosphere.

7. This can be calculated from the Clapeyron equation PV = NRT P is the pressure, V is the volume of gas, n is the amount of matter, t is the absolute temperature, R is the gas constant. All gases have the same r value. If the pressure, temperature and volume are in Si, r = 8.314 PA · m3 / mol · K. If the pressure is atmospheric pressure and the volume is l, then r = 0.0814 atmospheric pressure · L / mol · K. R is a constant) if it is a pressure method like a syringe. Take the syringe as an example. According to PV = NRT, the volume changes to the original Y / x, and the pressure changes to the original X / y. (I don't know whether the initial pressure is standard atmospheric pressure. The following analysis is based on the standard atmospheric pressure). The pressure inside the syringe is equal to the pressure generated by the external force plus the external atmospheric pressure. Need to know the cross-sectional area of syringe piston, so XP / y = P + F / s. The external force is the external force. Normal pressure means atmospheric pressure. Z volume space, air should also be Z volume If compressed air is installed, it is not normal pressure.) LZ hope to help you!

8.

P = f / S = g / S = mg / S = density VG / S = density SHG / S = density Hg, which is the conversion formula of pressure

the ratio of the pressure on an object to the area under force is called pressure. Pressure is used to compare the effect of pressure. The greater the pressure is, the more obvious the effect of pressure is

The unit of pressure is Pascal and the sign is PA

There are two ways to increase the pressure: increasing the pressure when the stress area is constant or decreasing the stress area when the pressure is constant

the methods to rece the pressure are: to rece the pressure under the condition of constant stress area or to increase the stress area under the condition of constant pressure

extended data:

standard atmospheric pressure. A unit of air pressure, usually used as the height of a mercury column

for example, a standard atmospheric pressure is equal to the weight of a 760 mm high mercury column, which is equivalent to 1.0336 kg of atmospheric pressure on a square centimeter area

because the weight and length units used in different countries are different, the pressure units are not unified, which is not convenient for the comparative analysis of global pressure. Therefore, it is universally stipulated that & quot; HPA & quot; As a unit of air pressure

after conversion: a standard atmospheric pressure = 1.013 × 105 PA

1 standard atmospheric pressure = 760 mm mercury column height

according to the molecular dynamics theory, the pressure of gas is proced by a large number of molecules frequently colliding with the vessel wall

The collision time of a single molecule on the vessel wall is very short, and the effect is discontinuous, but a large number of molecules frequently collide with the vessel wall,

the force on the vessel wall is continuous and uniform, and the ratio of the pressure to the vessel wall area is the pressure

9. 101kpa is not different from the standard atmospheric pressure.

10. One atmosphere = 1013 HPA