Constants
A 3.5 mL syringe has an inner diameter of 6.0 mm, a needle inner diameter of 0.23 mm, and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient's vein and so has to push against the patient's blood pressure which is 140 over 100. Assume the liquid is an ideal fluid and so the pressure in the medicine is the same as the patient.