What is Pipe: Definition and 1000 Discussions

A tobacco pipe, often called simply a pipe, is a device specifically made to smoke tobacco. It comprises a chamber (the bowl) for the tobacco from which a thin hollow stem (shank) emerges, ending in a mouthpiece. Pipes can range from very simple machine-made briar models to highly prized hand-made artisanal implements made by renowned pipemakers, which are often very expensive collector's items. Pipe smoking is the oldest known traditional form of tobacco smoking.

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  1. W

    Reaching for the Gold: Analyzing Forces to Snap a Pipe in Half

    I’ll try for the gold ring first and then come back to earth. Trying to find out the max forces to snap a pipe in-half (torsion problem) I have a 3”OD mechanical round tube with 1/4” wall its (ASTM-A 519) grade and 20ft long. At one end is welded a 14” long arm with a 3000psi cylinder(column...
  2. M

    Investigating Contact Stress in HighSpeed Pipe Rolling

    Contact Stress? I have a "High Spin" rolling system that spins pipe to compact cement lining. We are using tandem 7-14.5LT D/8 bias-ply tires on each end of the axles with the pipe riding in the saddle between two sets of tires. The tires are running approx. 70 MPH for just over a min. The...
  3. P

    Solving Closed Pipe Question: Length Difference of 2 Pipes

    Homework Statement Once closed organ pipe has a length of 3.2 m. Frequency of the note played by this pipe is 27 Hz. When a second pipe is played at the same time, a 1.50 Hz beat note is heard. By how much is the second pipe too long? Homework Equations ? The Attempt at a Solution...
  4. R

    How Much Energy is Conducted Through a Copper Pipe?

    Homework Statement I have to find the energy removed through conduction from a copper pipe. Pipe Inner Diameter (Din): 8mm Pipe Wall Thickness (Dout): 1mm Thermal Conductivity (k): 401W/m.K Temp inside pipe -150C, Outside 30C Length (L)=1m Homework Equations The Equation I used was...
  5. R

    The Science Behind Sucking Water Through a Pipe

    What do you call the force that enables water to keep coming after you suck on a pipe just as long as you keep the end of the pipe lower than the water level of the source. Is it the pressure difference or is it another force.
  6. M

    Building a Paper Pipe Organ: Tips & Advice

    Hello, I am trying to make a cardboard pipe organ...After a few days of research, I kind of have a idea of how the keys work, but I still have trouble on -make a workable pipe -make the air pass through the pipe I have made a 16cm * 1.5 cm * 1.5 cm cardboard (thickness: 1mm) pipe , with a...
  7. S

    Help Needed: Modeling a Loop Heat Pipe System for Mars Mission

    hey guys, im trying to model a loop heat pipe (lhp) system to cool various things on a spacecraft mission to Mars for a project I am doing in uni, does anyone know any equations that i could use to compute a value for length of lhp etc?? I've found lots of journals on the internet giving...
  8. T

    Open ended pipe Harmonics Mastering Physics Question

    [SOLVED] Open ended pipe Harmonics Mastering Physics Question Homework Statement Consider a pipe 45.0cm long if the pipe is open at both ends. Use v = 344m/s. Now pipe is closed at one end. What is the number of the highest harmonic that may be heard by a person who can hear frequencies...
  9. M

    An experiment to determine the speed of sound using a closed pipe.

    Would it be possible for someone to check over my experiment? I have not conducted the experiment yet, but I would like to make sure I am on the right tracks. The equation I will be using to determine the speed of sound is: v=f\lambda v is the speed of sound f is the frequency and this will...
  10. S

    Fill Tank in 24 mins Using Pipe A & B

    There are two pipes, Pipe A and Pipe B. Pipe A filled a tank in for minutes less than B does. If both pipes are open the tank is filled in 24 minutes. Find the time A will take if B is closed
  11. ~christina~

    Pipe and Bernoulli's Equation: Solving for Mass and Gauge Pressure

    Homework Statement In the figure below, fresh water flows through a horizontal drainage pipe and then out into the atmosphere at a speed v1 = 15 m / s. The diameters of the left and right sections are 5.0 cm and 3.0 cm. (a) Find the mass of water that flows into the atmosphere in one...
  12. T

    Help with a pipe, water, continuity and Bernoullie

    [SOLVED] Help with a pipe, water, continuity and Bernoullie Homework Statement At one point in a pipeline the water's speed is: 3.0 m/s, the gauge pressure is: 5.0*10^4. Find the gauge pressure at a second point in the line, 11m lower than the first, if the pipe diameter at the second...
  13. A

    Can Closed Pipes Produce Overtones from a Single Frequency Vibration?

    If you vibrate a tuning fork over a closed pipe (a pipe with one end closed and the other open) is it possible to get overtones in the pipe even thought the tuning fork only vibrates at one frequency For example if you have a tuning fork of freq 300HZ and you allow it too vibrate above a closed...
  14. K

    Calculate Maximum Stress in Pipe AB and Rod BC Shaft

    The built-up shaft consists of a pipe AB and solid rod BC. The pipe has an inner diameter of 20 mm and outer diameter of 28 mm. The rod has a diameter of 12 mm. Determine the maximum stress in the shaft. I have stress=V/A I picked 12N as V and Aream I am confused any help?
  15. P

    Standing Sound Waves in a pipe

    Homework Statement (a) Standing sound waves are produced in a pipe that is 2.00 m long and open at both ends. (Give all answers measured from the left end of the pipe, and from smallest to largest where there is more than one answer.) (i) For the fundamental and first two overtones...
  16. S

    Calculating Cantilever Pipe Weight Support

    Hello the forum; I am brand new here so I beg you indulgence. How do I calculate the amount of weight a pipe will support if used in a cantilever cituation?
  17. J

    Gauss Law:Wired in a pipe

    Homework Statement Consider an infinitely long cylindrical metallic shell with a line of charge within and coincides with the axis of the cylindrical shell as shown in Figure . How does E field vary with r? Homework Equations E.A=q/\epsilon E=E field, A = surface area The...
  18. wolram

    Burst Pipe Causes Unexpected Adventure in My Garden

    Yes i came home one morning to find water pouring down my drive, strange as it may seem the burst water pipe is nothing to do with my cottage it supplies several houses at the back of my property, any how i went out this afternoon to find two bloody great holes in my garden. In one i could just...
  19. R

    Water Flow Rate and Approximations: Insights from a Riemann Sum?

    Homework Statement t (hours) | R(t) (gallons per hour) 0 9,6 3 10,4 6 10,8 9 11,2 12 11,4 15 11,3 18...
  20. C

    Can You Tune an Organ Pipe Without Altering Its Physical Construction?

    Homework Statement You are playing a pipe organ, with pipes that are designed to be closed at one end, when you notice that one of the notes sounds wrong. You soon discover that one of the pipes has a hole in the end that was supposed to be closed. (a) After you patch up the hole, what will...
  21. B

    Harmonics in an Organ Pipe

    Homework Statement An organ pipe is 1.70 m long and it is open at one end and closed at the other end. What are the frequencies of the lowest three harmonics produced by this pipe? The speed of sound is 340 m/s. Only one answer is correct. 200 Hz, 400 Hz, 600 Hz 200 Hz, 300 Hz, 400 Hz 200...
  22. Z

    Help me with the leakage rate of a crack in a pressure pipe.

    I am thinking about the following situation. In a stagnation water loop, the pressure is building up. A crack occurs due to the expansion of the water. What will be the solution approach to determine the flow rate of the leakage? Please give some hints or references. Thank you.
  23. V

    Reducing pressure in a pipe

    Homework Statement The pressure in a section of horizontal pipe with a diameter of 1.80 cm is 144 kPa. Water flows through the pipe at 2.30 L/s. If the pressure at a certain point is to be reduced to 101 kPa by constricting a section of the pipe, what should the diameter of the constricted...
  24. S

    How can the average velocity in laminar fully developed pipe flow be calculated?

    This question has been bugging for a while now. I have been trying to solve it, but not getting anywhere. Hopefully, you guys can be of some help. Here's the question: For laminar fully developed pipe flow, show the average velocity V = 0.5u(max). Any help will be greatly appreciated! Thanks!
  25. M

    Finding Net Pressure force in a pipe

    I have a pipe that has an inlet (x-direction) and outlet (y-direction) with water flowing through it. I want to find net pressure force in x-direction (at the inlet) I have momentum flux and areas of the inlet and outlet. How can I find the net pressure force acting on the inlet? I don't...
  26. Y

    Calculating Water Tower's Drain Pipe Flow Rate

    A water tower, vented to the atmosphere, is drained by a pipe that extends to the ground. The top surface of the water in the tank is 13.3 m above the ground. If the valve in the drain pipe is closed, what is the absolute pressure in the drain pipe at ground level? 2.32×105 Pa If the valve...
  27. C

    CFM and PSI Requirements for Abrasive Blasting 80' Steel Pipe

    I am currently getting setting up a project where we will be abrasive blasting 48" dia steel pipe in 80' lenghts utilizing robotic equipment producing 1600 CFM @ 160 PSI. We are endevouring to identify the CFM requirements for our dust collection system which will be required at one end of the...
  28. T

    Smaller DN on pump than on pipe

    When I select a water pump for a pipe, I select the pump that matches the pipes nominell diameter. A DN100 pump for a DN100 pipe for instance. It only seems natural to me. But I see that others usually go down on the pump size, a DN65 or DN80 pump for a DN100 pipe for instance. Why is this...
  29. P

    How does that relate to the length of the wire?

    Homework Statement Given a pipe with 8cm circumference and length 20cm that is 8 turns of wire wrapped around a pipe, what's the length of the wire? Homework Equations circumference=2(pi)r=diameter*pi (I think) The Attempt at a Solution This is pic with problem. My...
  30. E

    Help! Understanding Ripple Formation in a Ripple Tank

    Help! Pipe sounds... Homework Statement Can someone please explain simply what happens when you make ripples in a ripple tank when there's something (like a piece of wood) in it and WHY it happens?? Homework Equations The Attempt at a Solution
  31. C

    Help - Heat Pipe Math Modeling

    Hello! i've been thinking, how can i get start modeling a heat pipe. At least a conceptual approach . it would be very helpfull ir someone here post any bibliography. thanks!
  32. N

    Fluid - Determining pump power for pipe flow system

    Fluid - Determining pump power for pipeline with constant head gentlemen, i need some help to solve for part b as attached. The friction factor for pipe 1 & 2are 0.003106 and 0.003438 respectively and the Z value calculated is 9.997m of water. With a 20% increase in flow rate for the piping...
  33. B

    Pressure drop in elbows & bends in a pipe

    hi! i want to calculate pressure drops in a pipe having various elbows ,bends & valves.whts equation should be used to calculate the pressure drop. thanks gaurav
  34. S

    Two tanks connected by a horizontal pipe

    from Applied Mathematics and Modeling for Chemical Engneers (Richard G. Rice) Two vertical cylindrial tanks, each 10 m high,are installed side-by-side in a tank farm, their bottoms at the same level.The tanks are connected at their bottoms by a horizontal pipe 2 meters long,with pipe inside...
  35. M

    Increasing temperature of an organ pipe

    If the temperature of an organ pipe is increased above room temperature thereby increasing the speed of sound waves in the pipe but not affecting the length of the pipe significantly, what effect does this have in the frequency of the standing waves produced by the pipe? My attempt If the...
  36. C

    Water Pipe Boyle's Law Mystery.

    This is a very curious situation. I have a large water tank on the top of a hill. It supplies a gravity fed water system that works fine. There is an under ground pipe with one end A in the bottom of the tank. The other end E is about 80 feet below A, and has a faucet. None of the pipe is...
  37. T

    Water Pipe System - Exploring Analogies & Calculations

    Hey guys, I'm currently having some trouble regarding the water pipe systems. The problem arose as I was exploring analogies for the electrical circuit. Alright firstly, in a water pipe, we need pressure difference for the water to flow, right? Okay, not necessary, as long as initially...
  38. V

    Two cylindrical tanks, connecting pipe and outlet pipe - Differential Equation

    Homework Statement Two vertical cylindrical tanks, each 10 meters high, are installed side-by-side. Their bottoms are at the same level. The tanks are connected at their bottoms by a horizontal pipe 2 meters long which has an internal diameter of 0.03 meters. The first tank is full of oil and...
  39. 5

    Looking for pipe flow information in cubic feet per minute.

    Does anyone have a chart of what a straight pipe flows in cfm? Like 3 inch inside diam.? 4 inch? Etc? Thanks:)
  40. G

    Calculating Resistance of Aluminum & Copper Pipe

    A cylindrical aluminum pipe of length 1.36 m has an inner radius of 1.80 10-3 m and an outer radius of 3.00 10-3 m. The interior of the pipe is completely filled with copper. What is the resistance of this unit? (Hint: Imagine that the pipe is connected between the terminals of a battery and...
  41. S

    Inductance coil with water pipe

    If I place a pipe filled with WATER inside of a coil and then half filled pipe of same material, does the inducatnec change? Will the change be able to be observed using multimeter? any ideas?
  42. T

    Velocity Split in T-Branch Pipe Flow?

    I have a supply pipe that splits into two using a T-branch. If the flow through the supply is x, will the flow through the two splits then have half the speed of the supply?
  43. R

    Eddy current pipe force equation

    When you drop a (strong) magnet into a copper pipe, it slows down. Is there an equation for calculating the force? I have searched and searched Google, but all i found was F=[(B^2)(l^2)v]/R, where B = magnetic field, l = circumference of tube, v = velocity of magnet, and R = resistance of pipe...
  44. E

    Will my water filled pipe freeze?

    I have a problem that my technical engineer training can't solve. We have static water pipes installed under a canopy of a building. The coldest air tempreture recorded is -8.5 Celius during winter. We can assume that the air tempreture stays at -8.5 Celius and there is minimal air movement...
  45. T

    Flow through a pipe along a reduced diameter

    Imagine a pipe of d=50mm with water flowing through. The pipe's diameter is reduced along a small section to 40, and then returned to 50. If I have a flow of x l/s along the first 50mm piece, will I also get x l/s along and after the reduction? Will the only change be more speed through the...
  46. G

    How Does Helium Affect the Fundamental Frequency of an Organ Pipe?

    Homework Statement A certain organ pipe, open at both ends, produces a fundamental frequency of 275 Hz in air. If the pipe is filled with helium at the same temperature, what fundamental frequency f will it produce? Take the molar mass of air to be 28.8 g/mol and the molar mass of helium to...
  47. I

    Calculating Pressure in a Narrowed Pipe

    Homework Statement Water flows at through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What is the reading of a pressure gauge in the wide section Homework Equations A_1*F_1=A_2*F_2 The...
  48. M

    Compressible air flow thorugh pipe

    Hi guys: I am wondering with issue regarding high speed (subsonic) compressible air flow thorugh a pipe exit to atmosphere. So here is detail: Air coming from a reservoir and flowing thorugh an adiabatic constant area pipe and exit to atmosphere at the end of the pipe. Due to high...
  49. Z

    Determine Inside Diameter of Horizontal Pipe Constriction

    Homework Statement The inside diameters of the larger portions of the horizontal pipe in Figure P9.40 are 2.80 cm. Water flows to the right at a rate of 2.00 10-4 m3/s. Determine the inside diameter of the constriction. Answer in (cm) Here is the picture...
  50. J

    Parametric equations for a helical pipe

    I am trying to represent a helical pipe in x,y,z co-ordinants, would the x and y co-ordinants simply be multiplied by the equation of a circle if the growth of the helix is in the z direction? Any help would be appreciated. Thanks
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