A 2.06 Newton force is applied to the plunger of a hypodermic needle. If the diameter of the plunger is 1.10 centimeter and that of the needle 0.210 mm,
A. Find with what force does the fluid leave the needle?
B. Obtain what force on the plunger would be needed to push fluid into a vein where the gauge pressure is 18.4 mm-Hg? Answer for the instant just before the fluid starts to move.