Pressure is the force exerted per unit area on an object. It is typically measured in units of pascals (Pa) or pounds per square inch (psi).
In a non-compressed gas, pressure is directly proportional to temperature and volume. This means that as temperature and volume increase, pressure also increases.
An orifice is a small opening or hole in a surface, such as a pipe or plate. In the context of pressure, it refers to the opening that a gas flows through.
As gas flows through an orifice, the pressure decreases. This is because the gas is expanding to fill the larger volume outside of the orifice, resulting in a decrease in pressure.
Studying pressure through an orifice is important in various industries, such as gas and oil, to accurately measure and control the flow of gases. It is also relevant in understanding the behavior of gases in different systems and processes.