MECHANICAL PROPERTIES OF FLUIDS

Explain why

(a) To keep a piece of paper horizontal, you should blow over, not under, it

(b) When we try to close a water tap with our fingers, fast jets of water gush

through the openings between our fingers

(c) The size of the needle of a syringe controls flow rate better than the thumb

pressure exerted by a doctor while administering an injection

(d) A fluid flowing out of a small hole in a vessel results in a backward thrust on

the vessel