Chapter 13
1. (p.360 prob.76A 2.4-N force is applied to the plunger of a hypodermic needle. If the diameter of the plunger is 1.3cm and that of the needle 0.20mm, (a) with what force does the fluid leave the needle? (b) What force on the plunger would be needed to push fluid into a vein where the gauge pressure is 18mm-Hg? answer for the instant just before the fluid starts to move.
2. (p.360 prob.82) One arm of a U-shaped tube (open at both ends) contains water and the other alcohol. If the two fluids meet exactly at the bottom of the U, and the alcohol is at a height of 18.0cm, at what height will the water be?
3. (p.361 prob.88) A ship carrying freshwater to a desert island in the Caribbean, has a horizontal cross-sectional area of 2650m2 at the waterline. When unloaded, the ship rises 8.50m higher in the sea. How much water was delivered?
4. (p.361 prob.95) You need to siphon water from a clogged sink. The sink has an area of 0.48m2 and is filled to a height of 4.0cm. Your siphon tube rises 50cm above the bottom of the sink and then descends 100cm to a pail as shown in Fig. 13-56. The siphon tube has a diameter of 2.0cm. (a) Assuming that the water enters the siphon tube with almost zero velocity, calculate its velocity when it enters the pail. (b) Estimate how long it will take to empty the sink.