What is Pipes: Definition and 166 Discussions

Homework Statement "A tank can be filled in 6 hours using 2 pipes. The larger pipe alone would fill it 5 hours sooner than the smaller pipe alone. How long would each pipe alone take?" Homework Equations I know it involves a quadratic not sure on the rest... I can't see how to do...

I have to put a spreadsheet together which tells me the most mechnically effecient and cost efficient configuration of a pump, piping, values, etc. Where can I find industry pricing for galvanized iron pipes and labor costs? thanks

Homework Statement A liquid is flowing through a horizontal pipe whose radius is 0.0215 m. The pipe bends straight upward through a height of 10.1 m. The pipe then bends back to the horizontal direction with a different radius of 0.0399 m. What volume flow rate will keep the pressures in the...

need help with this! as soon as possible please (fluid flow in pipes) here is my Q am facing a problem with i don't know how to start and i have to hand it in at 9 a.m Q: In a chemical processing plant, a fluid (Benzene) must be delivered to point B with a pressure of 550 kPa. A pump is...

Homework Statement An organ pipe has two successive harmonics with frequencies 1760 Hz and 2160 Hz. Is this an open or stopped pipe? Which two harmonics are these? What is the length of the pipe? Homework Equations L=v/2f The Attempt at a Solution I'm really just having trouble...

Homework Statement The problem is pretty long but it is easy except one part where I need to calculate the length of a rope where 2 pipes are tied together tightly. We can reduce this to 2 dimensions so I drew a rough sketch of it. I didn't quite succeed with the the perfect drawing but you...

[b]1. the lowest note on an organ is 16.4 Hz. What is the shortest open organ pipe that will resonate at this frequnecy? What would be the pitch if the same organ pipe were closed? [b]3. is the answer 32.8 meters and 65.6 meters?

Hi guys, Please help me out, I have a project here I need to design a pipe network system using Hardy Cross method. I have drawn my pipe network and done my distribution of the flow rate according to the give discharge. but now I'm not sure which method I should use in selecting pipe...

In a straight pipe flow, secondary flow patterns (i.e. perpendicular to the axis of the pipe) arise due to gravity in the form of two counterrotating vortices (or so I heard). But why is the dynamics at all changed in the presence of a gravitational field? Why isn't the pressure just...

Homework Statement A liquid is flowing through a horizontal pipe whose radius is 0.02m. The pipe bends staight upward through a height of 10.0m and joins another horizontal pipe whose radius is 0.04m. Homework Equations what volume flow rate will keep the pressures in the two horinontal...

Water Flow in pipes - urgent Homework Statement Water is flowing through a pipe whose radius is 0.04m with a speed of 15m/s. The same pipe goes up to the second floor of the building, 3m higher, and the pressure remains unchanged. What is the radius of the pipe on the second floor?EDIT: NVM...

I have been told that to solder properly the source of heat is to be directed at the bottom of object to be soldered (6 o'clock), Particularly, During a soldering operation to join two copper pipes.When I asked why that is, I was told it was due to convection distributing the heat around the...

Homework Statement two resevoirs, one 60m higher than the other are connected by a pipe 1.5 km long. The friction coefficient is 0.008, diameter of pipe is .155 m. the the velocity and volume flow of water into lower resevoir Homework Equations mgh=1/2 mv2 therefore v= square root of...

Hi, I was doing my fluid mechanics howework, and there was a question that I couln't quite answer. Assuming that the integral of the axial momentum remains constant along the pipe cross section, the pressure drops uniformly along the pipe length. (Contrary to the Bernulli equation where the...

I have two pipes inserted in each other .ID(internal pipe-PVC)=OD(external pipe-plastic)=50mm. They rub each other for 180 degree max in clockwise and anticlockwise direction, also slide by 80mm max (say in helical style). I wish to estimate the frictional torque consumed. I know the external...

I'm trying to create an rss feed from a html table on the main page of a web forum. I want to do this because the table displays the new posts. I use yahoo pipes and you can see my attempt here: http://pipes.yahoo.com/pipes/pipe.info?_id=0e72fee43090386fddbc9191f5cddc86 The pipes work up...

Sage is an agragator for firefox which makes it quick and easy to view rss feeds. http://pipes.yahoo.com/ is a feed blender let's you combine several rss feeds into one feed. I want to be able to more efficiently check new posts on forms, so I would like to be able to combine feeds from...

Hey all, I'm trying to make a cylindrical bonded magnet, but I need to compress it in a non magnetizable pipe capable up withstanding up to 10000 psi pressure, 1 cm or less in diameter. PVC only has a tensile rating of 7500 psi so it won't do. i would like to know what plastic(or any non...

Homework Statement A horizontal pipe 10.9 cm in diameter has a smooth reduction to a pipe 4.50 cm in diameter. If the pressure of the water (density = 1000 kg/m3) in the larger pipe is 7.50×104 Pa and the pressure in the smaller pipe is 5.70×104 Pa, at what rate (as mass per unit time) does...

Hi Guys I am trying to use a water filter in line with a 12V water pump rather than off the mains. The water filter requires 10psi minimum and a maximum of 125psi, I am using 15mm copper pipe and the pump is 800mm from the water filter. I have not yet decided on a pump yet as this is...

Homework Statement could someone please explain :- 1. why the fundamental frequencies of 2 open pipes of the same diameter and of lengths l and 2l are not exactly in the ratio 2:1? 2. given that 2 open pipes of the same diameter but of lengths 50cm and 100cm are found to produce...

I feel like the various members of the world of physics don't agree upon what the values of n, harmonics, and overtones line up for STOPPED pipes where f n = nv / 4L According to my physics textbook (University Physics Young and Freedman), for stopped pipes, 3rd harmonic = n is 3 = second...

So my teacher is horrible, and I pretty much have to teach myself everything. With this question, I am getting different answers than my teacher, and my teacher has been unable to explain to me satisfactorily why and how she got her answers. So please help me out, and even give some kind of...

Homework Statement Consider an apparatus design in which two tubes of different diameters are connected in parallel to each other. The flow is steady and fully developd in both tubes. Do your analysis regarding a)the governing differential equations for the case that in both tubes laminar...

Hi, I have started trying to make Native American Style Flutes, and have succeeded in making them. I can make them fine, but not knowing why I do what I do create them frustrates me. So recently I have started to become interested in the physics of them. The flute is a pipe open at both ends...

Hi, I have a question, it is related to flows between two resorvoirs where I need to calculate the discharge between two pipes, with different pipe diameters. The problem I have come across is where there is an expansion in the pipe size from 250mm diameter to 300mm, the formula states...

Hi How are standing waves set up in open pipes - my book says that the sound waves can be reflected from the open end of the pipe - how is this possible - surely the wave would just leave the pipe? Thanks in advance

Homework Statement A horizontal pipe 10.0cm in diameter has a smooth reduction to a pipe 5.00cm in diameter. If the pressure of the water in the larger pipe is 8.00x10^4Pa and the pressure in the smaller pipe is 6.00x10^4Pa, at what rate does water flow through the pipes? Homework...

how will the air temperature in a room affect the pitch of organ pipes?

Homework Statement The Lowest note on an organ is 16.4 Hz. a. What is the shortest pen organ that will resonate at this frequency b. What is the pitch of the same organ pipe is closed Homework Equations f=V(n)/2L, n=1,2,3.. f=V(n)/4L, n-1,3,5... The Attempt at a Solution I understand...

Homework Statement The fundamental frequency of an open organ pipe corresponds to E above middle C (329.6 Hz on the chromatic musical scale). The third resonance of a different closed organ pipe has the same frequency. What are the lengths of the two pipes?Homework Equations natural frequency...

Just curious as to why you don't find heat pipes or any passive cooling in larger PEM type fuel cells. I have seen them used in methanol fuel cells but not FCs for hydrogen. Is there a good reason for this? Is it because the power density of fuel cells is typically higher than that in many...

what are the principles regarding pipe OD, thickness & strength as well regarding round and square which one is more stronger. This matter came up becoz there are certain sizes of OD not available in HR but only available in CR, on the other hand there are certain sizes which we can convert form...

For pipes head loss causes pressure drop. If there is lower pressure at the end of the pipe, is the velocity lower? What I'm trying to figure out is if the average velocity in the pipe is constant. And how does it change if you place an object inside the pipe? Does velocity only change with a...

Relative Roughness of pipes! Homework Statement Here is the Data: Reservoir Water Entry Pipeline Pipeline Pipeline Number Level Coeff. Length Diameter Roughness m [AHD] [m] [m] [mm] 0 20.665 0.814 432.453...

[SOLVED] Water flow in pipes Homework Statement Water is circulating through a closed system of pipes in a two floor apartment. On the first floor, the water has a gauge pressure of 3.4 x 10^5 Pa and a speed of 2.1 m/s. However, on the second floor, which is 4.0m higher, the speed of the water...

Why is there the possibility of a water pipe breaking if the pipe is left full of water during extended frigid weather?

I want to know that what exactly causes the wave to get reflected in an open tube when there is nothing sort of a reflecting medium.

The topic came up the other day in class, about how the wave frequencies vary in each pipe of an organ. I am looking for some comprehensive information on the topic, and it would be great if someone could direct me, or maybe help a little bit as I am not so sure, as we haven't covered the topic...

I work for a plumbing company, and we recently put up some copper water pipes (~30mm) in a newly constructed building. The buidling isn't finished, and since it's below 0 degrees we can't test the pipes with water. So, we though about doing it with air instead. Some people tell me that this...

Greetings! This is for a Chilled water piping project (1000mm dia max). We are procuring pipes from SEAH Korea, from 250mm to 1000mm. And for calculations for support, load, thrust, etc, i need the following details for these pipes. 1. Coefficient of Linear Expansion 2. Longitudinal Elastic...

Homework Statement Can someone please tell me simply why pipes of different size and length make different sounds? Homework Equations The Attempt at a Solution

can anybody focus something on how pipes in parallel will work in comparison to the same pipes in series.i want to calculate pressure drop across 4 parallel pipes emerging from a tank & entering inside the other tank . pipes of sam dia,& same length. thnks

say i have a 1.5m diameter and 7m lond pipe, blocked of at one end and leading into a 2.8m diameter horizontaly laid manifold (so that effectively you have one small pipe branching of another large pipe), the pipes are filled with water. In order to calculate the resonance frequencies, i would...

I was unable to attend a class in which we learned this, so any explanation would be appreciated (working and answer would be appreciated). If a pipe is of 150mm dia. is carrying 40 litres/min from a site and it is replaced by 2 100mm dia. pipes carrying the same volume, what difference does...

Hey, If you have 3 pipes of different diameter flowing into another.. what needs to be true for the head loss in the 3 pipes to all be equal? ie Hf1 = Hf2 = Hf3 Cheers. :S

Homework Statement If you have a supply line of water running from one tank to another tank. And you started to drain the water out of one of the tanks. Would the downward flow of water create a suction or low pressure in the supply tube? . Relevant equations[/b] The Attempt...

Homework Statement The (two side open) pipes of a pipe organ range in length from 9m to 0.18m. What are the limits of the range of frequencies that can be produced by such pipes? Homework Equations For open pipes wavelength = 2L/n, L is length of pipe, n is number of segments or antinodes...

The "dark side" of fluid dynamics and aerospace engineering? http://today.reuters.co.uk/news/articlenews.aspx?type=oddlyEnoughNews&storyID=2007-01-26T190542Z_01_L2635862_RTRIDST_0_OUKOE-UK-AIRBUS-TOILETS.XML&WTmodLoc=HP-C13-Oddly-2

Hi. I would really appreciate it if someone could tell me whether I'm correct or not. :smile: 1. An open pipe (open at both ends) and a closed pipe (closed at one end) are the same length. If an organ blows air across the top of each pipe, what is true of the frequency (and pitch) of the...