Atmospheric Pressure And Gauge Pressure
Atmospheric pressure
graph TD;
B[Atmospheric Pressure];
B --> D[Definition];
D --> D1["Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth's atmosphere."]
B --> E[Units];
E --> E1["Pascal (Pa)"]
B --> F[Example];
F --> F1[Atmospheric pressure at sea level is approximately 101325 Pa.]
Gauge pressure
graph TD;
C[Gauge Pressure];
C --> G[Definition];
G --> G1[Gauge pressure is the pressure relative to the ambient pressure.]
C --> H[Units];
H --> H1["Pascal (Pa)"]
C --> I[Example];
I --> I1[If the atmospheric pressure is 101325 Pa, a tire inflated to a gauge pressure of 200000 Pa is actually at an absolute pressure of 301325 Pa.]
