Smoking can cause a person's arteries to constrict to 90 % of their normal radius. If the usual pressure difference needed to maintain a healthy blood flow rate in an artery is 405 Pa, what new pressure difference is needed to maintain the same volume flow rate (NOT flow speed)? You may assume that the artery has a length of 10 cm, a radius of 2 mm, and that blood has a viscosity of 2.7×10−3N⋅s/m2.7×10−3N⋅s/m. (in Pa) 450 328 617 500 266
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
Smoking can cause a person's arteries to constrict to 90 % of their normal radius. If the usual pressure difference needed to maintain a healthy blood flow rate in an artery is 405 Pa, what new pressure difference is needed to maintain the same volume flow rate (NOT flow speed)? You may assume that the artery has a length of 10 cm, a radius of 2 mm, and that blood has a viscosity of 2.7×10−3N⋅s/m2.7×10−3N⋅s/m. (in Pa)
| 450 | 328 | 617 | 500 | 266 |
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