fire hose 3.8 cm in diameter is capable of spraying water at a velocity of 12 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary
Key point: in one second the volume of water flowing through the big hose and the small hose will be the same. (The flow speeds are be different) The volume of water flowing through a hose with cross area of A in 1 second is volumev*A where Api*r^2 thus volumev*pi*r^2 (v is the speed of water) For the large hose the water volume in 1 sec is: volumev1*pi*r1^2 For the smaller hose, volumev2*pi*r2^2 equating the 2 equations, v1*pi*r1^2 v2*pi*r2^2 v2v1*(r1/r2)^2 v211*(6/2)^2 v299 m/s
Yo this guy is sabotaging your relationship.. he shouldn't be your friend. This guy sounds like an idiot and if you've asked him multiple times to stop and is doing these things, he is HARASSING you and your girlfriend. This sounds like it's getting really serious as he's invading you and your girlfriend's privacy. Honestly, before it gets too serious and he does something really stupid, threaten to charge criminal offence on him (this can be done in this situation).
