A hypodermic syringe has a plunger area 2.5 cm^2 and a 5.0 X10^-3 needle.
a) If a small obstruction is at the end of the needle, what force does the fluid exert on it?
b) If a 1.0-N force is applied to the plunger, what is the measure pressure in the syringe's chamber?
c) If the blood pressure in a vein is 50 mm Hg, what force should be applied on the plunger so that fluid can be injected into the vein?