Not really. People with a PE feel short of breath but have no problem moving air. People with severe asthma look terrified as they struggle to move air in and out of their lungs. With asthma it is a can't breathe issue rather than with a PE where it's breathing not working as well as expected.
Mass Flow Rate Fluids Floww Equation. The mass flow rate of a system is a measure of the mass of fluid passing a point in the ( Ë m) system per unit time. The mass flow rate is related to the volumetric flow rate as shown in Equation 3-2 where r is the density of the fluid. If the volumetric flow rate is in cubic feet per second and the density is in pounds-mass per cubic foot, Equation 3-2 results in mass flow rate measured in pounds-mass per second. Other common units for measurement of mass flow rate include kilograms per second and pounds-mass per hour.
A pumpâs flow rate is simply the volume of gas or vapor it can move per unit of time, with units variously reported as liters per minute (lpm), cubic feet per minute (cfm), or cubic meters per hour (m3/hr).