A drug is being delivered into a patient's arm at a rate of 25.0 mL/min. The drug is being delivered from a syringe through a 7.5 cm long needle with an internal diameter of 0.5 mm. If the patient's blood pressure is 110.0 mmHg (+15.0 kPa gauge pressure, and ignoring the variation from systolic to diastolic), what must the pressure in the syringe be? (ŋdrug = 8.90 x 104 Pa/s) A drug is being delivered into a patient's arm at a rate of 250.0 mL/min. The drug is being delivered from a syringe through a needle with an internal diameter of 0.5 mm. This drug has a density of 1050 kg/m³. Is the flow laminar or turbulent? (ndrug = 8.90 x 10-4 Pa/s).
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.
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