Question

Automatic infusion syringe pump is injecting medicine to a patient as shown in the figure below. The syringe is placed 0.30m above the patient’s arm. The radius of the syringe is 6.0 x10^-4m and the radius of the needle inserting to arm is 4.0 x10^-5m. The drug solution, which has a density of 1000kg/m³ , flows in the needle with an average speed of 2.5m/s. The pressure in the needle is 8.0mmHg. (1 mmHg = 133 Pa)

1. What is the average speed of drug solution in the syringe?   

2. Which is the correct equation to find the pressure in the syringe? (s: syringe; n: needle)

3. Select the correct value of pressure in the syringe

4. Determine the force applied to the syringe

Answer 1