CMHG calculation force
Publish: 2021-05-19 15:16:47
1. A formula of liquid pressure: P= ρ gh ρ The gravity forming pressure of water is: P1= ρ Water GH
generation data can be
similarly, atmospheric pressure: P2= ρ The final result: P = P1 + P2
2
this question may mean that you can use "75cmhg" as the known condition.
If I remember correctly, the pressure formed by a 13.6m high water column is just the atmospheric pressure on the ground, that is, 75cmhg.
then the answer is 75cmhg * 2 = 150cmhg
generation data can be
similarly, atmospheric pressure: P2= ρ The final result: P = P1 + P2
2
this question may mean that you can use "75cmhg" as the known condition.
If I remember correctly, the pressure formed by a 13.6m high water column is just the atmospheric pressure on the ground, that is, 75cmhg.
then the answer is 75cmhg * 2 = 150cmhg
2. Vacuum refers to the rarefied degree of gas in vacuum. If the pressure in the measuring equipment is lower than atmospheric pressure, the pressure measurement needs a vacuum gauge. The value read from the vacuum meter is called vacuum degree. The value of vacuum degree indicates that the actual value of system pressure is lower than atmospheric pressure, that is: vacuum degree = atmospheric pressure - absolute pressure, absolute pressure = atmospheric pressure + gauge pressure (- vacuum degree).
3.
Torricelli, an Italian scientist, used a glass tube to measure the height of mercury column supported by atmospheric pressure, that is, 76cm, which is the size of a standard atmospheric pressure later specified. The specific value is:
P= ρ< Sub > mercury < / sub > GH = 13.6 × 10 3 kg/m 3 × 9.8N/kg × 0.76m=1.013 × 10 < sup > 5 < / sup > Pa.
so the answer is: 76; one point zero one three × 10 5 Torricelli
4. CMHG is the pressure proced by the height of the mercury column, which can be calculated by the formula P= ρ GH = 13600kg / m3 * 9.8n/kg * h, h is the height of the mercury column, which should be converted from centimeter to meter. The result is the pressure in PA. Multiply it by square meters to get the pressure. You can't take it directly.
5. CMHG is CMHG
kPa is 1000 Pascal
1cmhg = 1.33322 kPa
kPa is 1000 Pascal
1cmhg = 1.33322 kPa
6. one point zero one × 105 PA, 761 standard atmospheric pressure is measured by Torricelli experiment, which is 1.013 × At 105 PA, a standard atmospheric pressure can support 76 cm mercury column
7. MmHg is converted into kPa, and the original number is multiplied by 4 and divided by 30; 1mmHg=0.133kPa =133Pa
1atm=76cmHg=101325Pa
1atm=76cmHg=101325Pa
8. In physics, different units must be changed into the same before they can be added.
the most standard is that the units in various formulas are all international units in the system of units, such as m, s, kg, etc.
because all physical formulas are based on the international system of units, otherwise if you say e = MC ^ 2, if you take different units, there will be different results
the most standard is that the units in various formulas are all international units in the system of units, such as m, s, kg, etc.
because all physical formulas are based on the international system of units, otherwise if you say e = MC ^ 2, if you take different units, there will be different results
9. A standard atmospheric pressure is about 760 mm Hg, while an atmospheric pressure is 1 000 MPa
10. One standard atmospheric pressure is equal to 76cmhg
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