A hose is a flexible hollow tube designed to carry fluids from one location to another. Hoses are also sometimes called pipes (the word pipe usually refers to a rigid tube, whereas a hose is usually a flexible one), or more generally tubing. The shape of a hose is usually cylindrical (having a circular cross section).
Hose design is based on a combination of application and performance. Common factors are size, pressure rating, weight, length, straight hose or coilhose, and chemical compatibility.
Applications mostly use nylon, polyurethane, polyethylene, PVC, or synthetic or natural rubbers, based on the environment and pressure rating needed. In recent years, hoses can also be manufactured from special grades of polyethylene (LDPE and especially LLDPE). Other hose materials include PTFE (Teflon), stainless steel, and other metals.
Dredge rubber hoses have a long story, which features high strength and flexibility. A flexible dredging hose widely used in dredgers for silt/gravels conveyance. It is abrasion and wear-resistant to ensure long service life. Types of flexible dredge hose: floating rubber hose, discharge hose, suction hose, armored hose,ceramic hose.
How do "automatic" fire hose nozzles work?
I'm hoping someone can explain to me how "automatic" fire hose nozzles work. As in TFTs (Task Force Tips). I have a background in physics and since becoming a volunteer firefighter for my own interest have been working through some of the physics...
Homework Statement
A fireman 52.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 34.0° above the horizontal. If the speed of the stream as it leaves the hose is 40.0 m/s, at what height will the stream of water strike the building...
Homework Statement
Suppose you adjust your garden hose nozzle for a hard stream of water. You point the nozzle vertically upward at a height of 1.5 above the ground. When you quickly turn off the nozzle, you hear the water striking the ground next to you for another 2.0 . find the water speed...
Homework Statement
I just need a concept explained, then I can figure out the numbers. A tank with depth h is being filled through a hole from the bottom. The velocity of the water from the hose is known as well as the size hole. Pressure at the top of the water column is atm. What is the...
I had an idea the other day and I wondered whether or not it was possible. I want to build a water tank hooked up to a hose that can fire with the force of a real fire hose ( I'd really be delighted if I only reached half that ). Here's what the numbers:
A fire hose has roughly 8 bars of...
Homework Statement
A water hose 2 cm in diameter is used to fill a 20 L bucket. If it takes 1 min to fill the bucket, what is the speed at which the water moves through the hose ( note 1L= 1000cm^3)
Homework Equations
Bernoulli's equation
P1+.5pv^2+pgh1=P2+.5pv^2+pgh2
The Attempt at...
I know the topic has been dealt in the past, I read it but still couldn't extrapolate a satisfying answer.
I would like to know how Berboulli equation applies to a hose without restrictions in which fluid (water) exits at atmospheric pressure, the typical garden situation without any nozzle.
I...
Homework Statement
A horizontal stream of water from a fire-fighter's hose hits a vertical wall. The firefighter knows that 16.9 kg of water are emitted from the hose per second, and that the water has a speed of 45.5 m/s. At the instant when it hits the wall, the direction of the velocity...
A fire hose must be able to shoot water to the top of a building 35.0 m tall when aimed straight up. Water enters this hose at a steady rate of 0.500 m3/s and shoots out of a round nozzle.
i) What is the maximum diameter this nozzle can have?
ii) If the only nozzle available has a diameter...
Hi All,
A friend and I were recently considering the idea of measuring water flow in a fire hose, buy measuring the flux generated by the water moving through the hose. Neither of us are scientific by any means, but I've been trying to research the idea and have not gotten very far.
I...
Firemen are shooting a stream of water at a burning building using a high-pressure hose that shoots out the water with a speed of 25.0 {\rm m/s} as it leaves the end of the hose. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation \alpha of...
Water flows at 0.67 m/s through a 3.0 cm diameter hose that terminates in a 0.35 cm diameter nozzle. Assume laminar non-viscous steady-state flow.
(a) At what speed does the water pass through the nozzle?
49.22 m/s
(b) If the pump at one end of the hose and the nozzle at the other end are...
if i have a hose that is 1" in diameter, and 7 ft long before coming to a U section 4 inches high, and I have this hose full of water standing vertically, how much horse power does this hose of water contain?
I put on my cutest bikini, grab a bucket that holds one cubic foot of volume, and a 50 pound weight, and jump in the pool. I submerge the bucket, evacuating all of the air, and turn the bucket upside down. I put the weight on top of the bucket. My girlfriend, who looks terrific in her one piece...
A fire hose sprays 450 liters of water a minute onto a fire with a velocity of 17.0 m/s. Water has a density of 1 kg/liter. What is the average force acting on the fireman holding the hose due to the water?
Is it just:
F=pt
F=450*17.0*60
F=459000N
The force seems kind of big?
My teacher gave our class a hypothetical situation today, and asked if it was possible.
He asked if a hose were attached to a faucet, is it possible for the hose to be long enough so that the resistance in the hose causes the water to stop.
Is this possible?
From what I have thought...
[b]1. A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 470 L/min through a 0.80 cm diameter nozzle?
Homework Equations
I think we...
I was wondering if someone could tell me a formula for how much force is required to push water through a hose. I am going to try to figure out how much force is needed to push water vertically 40 cm through 5/16 inch tubing.
It's my first time writing on this forum, hope I'm posting in the correct section.
Problem :
A hose directs a horizontal jet of water on to a vertical wall.
What is the force on the wall, under the above conditions ? Explain.
Thanks for any replies
Homework Statement
A nozzle of inner radius 1.03 mm is connected to a hose of inner radius 7.97 mm. The nozzle shoots out water moving at 25.5 m/s.
(a) At what speed is the water in the hose moving?
42.589 cm/s
(b) What is the volume flow rate?
84.989 cm3/s
(c) What is the mass flow...
Homework Statement
A fire hose held near the ground shoots water at a speed of 6.8 m/s. At what angle(s) should the nozzle point in order that the water land 2.0 m away? Why are there two different angles?
The Attempt at a Solution
First, I don't know why there would be two angles. I only...
A fire hose held near the ground shoots water at a speed of 7.8 m/s.
At what angles should the nozzle point in order that the water land 2.0 m away
I don't even know where to start. Can anyone set me in the right direction?
Here's a silly question.
If I'm comparing two different sizes of hose, using the same flow rate in gpm, how do I calculate the pressure drops through each for comparison?
I'm considering using hoses with interior diameter .438 and .688, each with a length of 5 inches.
The question states: A firemans hose has a nozzle of area 5cm^2 and the hose has a cross sectional area of 360cm^2. The hose ejects water at 25m/s and at a rate of 12L/s What is the force that the fireman must exert to keep the hose steady?
My attempt:
What I have done so far is to...
Suppose you adjust your garden hose nozzle for a hard stream of water. You point the nozzle vertically upward at a height of 1.5m above the ground. When you quickly move away from the vertical you hear the water striking the ground next to you for another 2.0s. What is the water speed as it...
Hello,
This problem has been messing me up.
A person waters their yard. He has a rubber hose cylinder with an inner radius,R_i[\tex], of 1.5 cm and an outer radius, R_o, of 1.7 cm. The thermal conductivity of of rubber is 0.2 in SI units. The hose is 5 meters long, L. The hose is...
Why does squeezing a hose make the water go futher?
According to the continuity equation, A1v1 = A2v2, reducing the area of the opening will cause the velocity to increase.
However, according to Bernoulli's eqn, increase in velocity will cause a decrease in pressure, so that will mean that...
[SOLVED] Gauge Pressure
A garden hose is attached to a water faucet on one end and a spray nozzle on the other end. The water faucet is turned on, but the nozzle is turned off so that no water flows through the hose. The hose lies horizontally on the ground, and a stream of water sprays...
Water flows from a garden hose. If the end of the garden hose is turned downward, a steady stream of water is seen to emerge from it. Upon closer observation, it can be seen that the flow of water is wide when it has just emerged from the hose pipe, and becomes more narrow as it descends (see...
Hello. I've been fustrated all day because I couldn't figure this problem out. I know, it may be simple, but trust me, I almost ripped my hair out trying to solve this problem. I would have been able to figure this problem out last year in basic physics, but I have forgotten 75% of physics I...
A Hose shoots water straight up for a distance of 2.5m. The end opening on the hose has an area of .75cm^2. (A) What is the speed of the water as it leaves the hose? (B) How much water comes out in 1 minute.
If I have A i can find B, I just can't figure out how to find A. I know gravity is...
I am new here so I hope that someone may have some advice. I am having trouble with a homework question which is quite lengthy. -- A large tank of water has a hose connected to it as shown in the figure. The tank is sealed at the top and has compressed air between the water surface and the...
Help:(
1) A firefighter, 50m away froma building, directs a hose at an angle of 30*, if the initial speed of the stream is 40m/s, what height does it hit the building?
i'm guessing i make a triangle and solve for h
tan30= h/50, solve for h, i get 28 m
...but it's not the right...
[SOLVED] Hose Physics
Suppose you adjust your garden hose nozzle for a hard stream of water. You point the nozzle vertically upward at a height of 1.5 m above the ground (the hose is 1.5 m off the ground). When you quickly move the nozzle from the vertical you hear the water striking the ground...