Pipes Definition and 156 Threads

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...

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...

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...

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...

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 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

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...

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...

Some time in the past my father took it upon himself to due a little plumbing. He decided that it was okay to use solder that contained lead to connect two pipes right near the output of the water heater. His reasoning was that we would not get lead poisoning because we could always use cold...

If you have two pipes of water flowing directly into one another and both are at 5psi and at the point where they interact with each other there is a tube like a tee. where the fluid can escape. Will the two force of water increase the total pressure and the force of the water leaving the tee.

help! how do we solve a mixing problem involving 3 inlet pipes and 2 outlet pipes?is it okay to just add up the 3 rates of input as well as their respective concentrations? all the sample problems i have encountered involves only 1 inlet and one outlet pipe..

I usually use an average number of 2 kPa friction loss for normal tap water in pipes. Does anyone know if this number changes significantly up or down for water which is around 80 degrees C instead of 5?

The drawing below shows two pipes lying on top of each other. Forces act on the different contact points, and I am to determine these as a result of the pipes' weight G. I'm able to do this graphically, but not by calculation. Next up is a similar problem, I'm to determine the forces at A...

Two pipes, equal in length, are each open at one end. Each has a fundamental frequency of 473 Hz at 297 K. In one pipe the air temperature is increased to 302 K. If the two pipes are sounded together, what beat frequency results? I think I missed this day entirely due to another project. I...

A friend in another city tells you that she has a pair of organ pipes, one open at both ends, the other open at one end only. In addition, she has determined that the beat frequency caused by the second-lowest frequency of each pipe is equal to the beat frequency caused by the ninth-lowest...

My physics teacher explained to our class the traditional "dropping a magnet through a tube" experiment. As we all know, it slows down and takes longer than usual to fall through. However, he gave us an explanation that I am unsure about. I seem to remember reading about a different explanation...

Hey! Was just wondering if someone could shed some light on the whole stationary waves thing. I've done about them in my A-Level Physics course and I can't for the life of me figure out what it's about. I mean, why can you only have a certain number of nodes, hence certain frequencies...